{"id":150659,"date":"2022-11-11T11:49:10","date_gmt":"2022-11-11T06:19:10","guid":{"rendered":"https:\/\/ccssanswers.com\/?p=150659"},"modified":"2022-11-14T16:34:39","modified_gmt":"2022-11-14T11:04:39","slug":"spectrum-math-grade-4-chapter-1-lesson-1-answer-key","status":"publish","type":"post","link":"https:\/\/ccssanswers.com\/spectrum-math-grade-4-chapter-1-lesson-1-answer-key\/","title":{"rendered":"Spectrum Math Grade 4 Chapter 1 Lesson 1 Answer Key Adding 1- and 2-Digit Numbers"},"content":{"rendered":"

This handy Spectrum Math Grade 4 Answer Key<\/a> Chapter 1 Lesson 1.1 Adding 1- and 2-Digit Numbers<\/b><\/strong>\u00a0provides detailed answers for the workbook questions.<\/p>\n

Spectrum Math Grade 4 Chapter 1 Lesson 1.1 Adding 1- and 2-Digit Numbers Answers Key<\/h2>\n

Adding and Subtracting 1 and 2 Digits<\/p>\n

\"Spectrum
\nIf 6 + 3 = 9, then 60 + 30 = 90.<\/p>\n

\"Spectrum<\/p>\n

Add.<\/strong><\/p>\n

Question 1.
\na.
\n\"Spectrum
\nAnswer
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\"Spectrum
\nExplanation:
\nAdding the ones we get 1 + 8 = 9
\nAdding the tens we get 1 + 0 = 1
\nSo, the sum of both addends 11 and 8 is 19
\n11 + 8 = 19<\/p>\n

b.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0 \"Spectrum
\nExplanation:
\nAdding the ones we get 0 + 0 = 0
\nAdding the tens we get 1 + 3 = 4
\nSo, the sum of both addends 10 and 30 is 40
\n10 + 30 = 40<\/p>\n

c.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\" \u00a0\"Spectrum
\nExplanation:
\nAdding the ones we get 5 + 4 = 9
\nAdding the tens we get 2 + 1 = 3
\nSo, the sum of both addends 25 and 14 is 39
\n25 + 14 = 39<\/p>\n

d.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \"Spectrum
\nExplanation:
\nAdding the ones we get 1 + 8 = 9
\nAdding the tens we get 8 + 1 = 9
\nSo, the sum of both addends 81 and 18 is 99
\n81 + 18 = 99<\/p>\n

e.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0 \u00a0 \"Spectrum
\nExplanation:
\nAdding the ones we get 2 + 7 = 9
\nAdding the tens we get 5 + 1 = 6
\nSo, the sum of both addends 52 and 17 is 69
\n52 + 17 = 69<\/p>\n

f.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0 \"Spectrum
\nExplanation:
\nAdding the ones we get 4 + 3 = 7
\nAdding the tens we get 7 + 2 = 9
\nSo, the sum of both addends 74 and 23 is 97
\n74 + 23 = 97<\/p>\n

Question 2.
\na.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \"Spectrum
\nExplanation:
\nAdding the ones we get 0 + 0 = 0
\nAdding the tens we get 1 + 8\u00a0 = 9
\nSo, the sum of both addends 10 and 80 is 90
\n10 + 80 = 90<\/p>\n

b.
\n\"Spectrum
\nAnswer:
\nAdd the ones
\n\"Spectrum
\nExplanation:
\nAdding the ones we get 7 + 2 = 9
\nSo, the sum of both addends 7 and 2 is 9
\n7 + 2 = 9<\/p>\n

c.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \"Spectrum
\nExplanation:
\nAdding the ones we get 5 + 4 = 9
\nAdding the tens we get 1 + 0\u00a0 = 1
\nSo, the sum of both addends 15 and 4 is 19
\n15 + 4 = 19<\/p>\n

d.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \"Spectrum
\nExplanation:
\nAdding the ones we get 7 + 2 = 9
\nAdding the tens we get\u00a0 0 + 9 = 9
\nSo, the sum of both addends 7 and 92\u00a0 is 99
\n7 + 92 = 99<\/p>\n

e.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0 \"Spectrum
\nExplanation:
\nAdding the ones we get 1 + 6 = 7
\nAdding the tens we get\u00a0 7 + 0 = 7
\nSo, the sum of both addends 71 and 6 is 77
\n71 + 6 = 77<\/p>\n

f.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0 \"Spectrum
\nExplanation:
\nAdding the ones we get 0 + 0 = 0
\nAdding the tens we get\u00a0 7 + 1 = 8
\nSo, the sum of both addends 70 and 10 is 80
\n70 + 10 = 80<\/p>\n

Question 3.
\na.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0\"Spectrum
\nExplanation:
\nAdding the ones we get 7 + 2 = 9
\nAdding the tens we get\u00a0 0 + 2 = 2
\nSo, the sum of both addends 7 and 22 is 29
\n7 + 22 = 29<\/p>\n

b.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0 \"Spectrum
\nExplanation:
\nAdding the ones we get 0 + 0 = 0
\nAdding the tens we get\u00a0 2 + 3 = 5
\nSo, the sum of both addends 20 and 30 is 50
\n20 + 30 = 50<\/p>\n

c.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0\"Spectrum
\nExplanation:
\nAdding the ones we get 2 + 7 = 9
\nAdding the tens we get\u00a0 9 + 0 = 9
\nSo, the sum of both addends 92 and 7 is 99
\n92 + 7 = 99<\/p>\n

d.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0 \u00a0\"Spectrum
\nExplanation:
\nAdding the ones we get 3 + 6 = 9
\nAdding the tens we get\u00a0 8 + 1 = 9
\nSo, the sum of both addends 83 and 16 is 99
\n83 + 16 = 99<\/p>\n

e.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0 \u00a0\"Spectrum
\nExplanation:
\nAdding the ones we get 6 + 3 = 9
\nAdding the tens we get\u00a0 4 + 2 = 6
\nSo, the sum of both addends 46 and 23 is 69
\n46 + 23 = 69<\/p>\n

f.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0 \"Spectrum
\nExplanation:
\nAdding the ones we get 0 + 0 = 0
\nAdding the tens we get\u00a0 7 + 2 = 9
\nSo, the sum of both addends 70 and 20 is 90
\n70 + 20 = 90<\/p>\n

Question 4.
\na.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0 \u00a0\"Spectrum
\nExplanation:
\nAdding the ones we get 2 + 1 = 3
\nAdding the tens we get\u00a0 0 + 4 = 4
\nSo, the sum of both addends 2 and 41 is 43
\n2 + 41 = 43<\/p>\n

b.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0 \u00a0 \"Spectrum
\nExplanation:
\nAdding the ones we get 0 + 0 = 0
\nAdding the tens we get\u00a0 3 + 3 = 6
\nSo, the sum of both addends 30 and 30 is 60
\n30 + 30 =60<\/p>\n

c.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0 \u00a0 \"Spectrum
\nExplanation:
\nAdding the ones we get 1 + 8 = 9
\nAdding the tens we get\u00a0 5 + 4 = 9
\nSo, the sum of both addends 51 and 48 is 99
\n51 + 48 = 99<\/p>\n

d.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0 \"Spectrum
\nExplanation:
\nAdding the ones we get 4 + 4 = 8
\nAdding the tens we get\u00a0 3 + 2 = 5
\nSo, the sum of both addends 34 and 24 is 58
\n34 + 24 = 58<\/p>\n

e.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0\"Spectrum
\nExplanation:
\nAdding the ones we get 7 + 2 = 9
\nAdding the tens we get\u00a0 0 + 2 = 2
\nSo, the sum of both addends 7 and 22 is 29
\n7 + 22 = 29<\/p>\n

f.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0 \u00a0\"Spectrum
\nExplanation:
\nAdding the ones we get 0 + 0 = 0
\nAdding the tens we get 2 + 5 = 7
\nSo, the sum of both addends 20 and 50 is 70
\n20 + 50 = 70<\/p>\n

Question 5.
\na.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0 \"Spectrum
\nExplanation:
\nAdding the ones we get 0 + 5 = 5
\nAdding the tens we get 3 + 1 = 4
\nSo, the sum of both addends 30 and 15 is 45
\n30 + 15 = 45<\/p>\n

b.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0 \u00a0 \"Spectrum
\nExplanation:
\nAdding the ones we get 1 + 1 = 2
\nAdding the tens we get 2 + 2 = 4
\nSo, the sum of both addends 21 and 21 is 42
\n21 + 21 = 42<\/p>\n

c.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0\"Spectrum
\nExplanation:
\nAdding the ones we get 7 + 2 = 9
\nAdding the tens we get 0 + 4 = 4
\nSo, the sum of both addends 7 and 42\u00a0 is 49
\n7 + 42 = 49<\/p>\n

d.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0\"Spectrum
\nExplanation:
\nAdding the ones we get 0 + 0 = 0
\nAdding the tens we get 4 + 4 = 8
\nSo, the sum of both addends 40\u00a0 and 40 is 80
\n40 + 40 = 80<\/p>\n

e.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \"Spectrum
\nExplanation:
\nAdding the ones we get 7 + 2 = 9
\nAdding the tens we get\u00a0 0 + 2 = 2
\nSo, the sum of both addends 7 and 22 is 29
\n7 + 22 = 29<\/p>\n

f.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0 \u00a0 \"Spectrum
\nExplanation:
\nAdding the ones we get 0 + 0 = 0
\nAdding the tens we get 2 + 5 = 7
\nSo, the sum of both addends 20 and 50 is 70
\n20 + 50 = 70<\/p>\n

Question 6.
\na.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0\"Spectrum
\nExplanation:
\nAdding the ones we get 4 + 4 = 8
\nAdding the tens we get\u00a0 3 + 3 = 6
\nSo, the sum of both addends 34\u00a0 and 34 is 68
\n34 +34 = 68<\/p>\n

b.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0\"Spectrum
\nExplanation:
\nAdding the ones we get 0 + 3 = 3
\nAdding the tens we get\u00a0 6 + 1 = 7
\nSo, the sum of both addends 60 and 13 is 73
\n60 + 13 = 73<\/p>\n

c.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0 \u00a0 \"Spectrum
\nExplanation:
\nAdding the ones we get 9 + 0 = 9
\nAdding the tens we get\u00a0 0 + 3 = 3
\nSo, the sum of both addends 9 and 30 is 39
\n9 + 30 = 39<\/p>\n

d.
\n\"Spectrum
\nAnswer:
\nAdd the ones
\n\"Spectrum
\nExplanation:
\nAdding the ones we get\u00a0 4 + 3 = 7
\nSo, the sum of both addends 4 and 3 is 7
\n4 + 3 = 7<\/p>\n

e.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0\"Spectrum
\nExplanation:
\nAdding the ones we get 3 + 6 = 9
\nAdding the tens we get\u00a0 1 + 0 = 1
\nSo, the sum of both addends 13 and 6 is 19
\n13 + 6 = 19<\/p>\n

f.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0 \"Spectrum
\nExplanation:
\nAdding the ones we get 4 + 3 = 7
\nAdding the tens we get\u00a0 4 + 3 = 7
\nSo, the sum of both addends 44 and 33 is 77
\n44 + 33 = 77<\/p>\n

Question 7.
\na.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \"Spectrum
\nExplanation:
\nAdding the ones we get 3 + 2 = 5
\nAdding the tens we get\u00a0 0 + 3 = 3
\nSo, the sum of both addends 3 and 32 is 35
\n3 + 32 = 35<\/p>\n

b.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0 \u00a0\"Spectrum
\nExplanation:
\nAdding the ones we get 5 + 0 = 5
\nAdding the tens we get\u00a0 0 + 1 = 1
\nSo, the sum of both addends 5 and 10 is 15
\n5 + 10 = 15<\/p>\n

c.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0 \u00a0\"Spectrum
\nExplanation:
\nAdding the ones we get 3 + 4 = 7
\nAdding the tens we get\u00a0 6 + 2 = 8
\nSo, the sum of both addends 63 and 24 is 87
\n63 + 24 = 87<\/p>\n

d.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0 \u00a0 \"Spectrum
\nExplanation:
\nAdding the ones we get 1 + 0 = 1
\nAdding the tens we get\u00a0 7 + 2 = 9
\nSo, the sum of both addends 71 and 20 is 91
\n71 + 20 = 91<\/p>\n

e.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0 \"Spectrum
\nExplanation:
\nAdding the ones we get 1 + 8 = 9
\nAdding the tens we get\u00a0 4 + 0 = 4
\nSo, the sum of both addends 41 and 8 is 49
\n41 + 8 = 49<\/p>\n

f.
\n\"Spectrum
\nAnswer:
\nAdd the ones\u00a0 \u00a0Add the tens
\n\"\"\u00a0 \u00a0 \u00a0 \u00a0 \"Spectrum
\nExplanation:
\nAdding the ones we get 2 + 0 = 2
\nAdding the tens we get\u00a0 3 + 3 = 6
\nSo, the sum of both addends 32 and 30 is 62
\n32 + 30 = 62<\/p>\n","protected":false},"excerpt":{"rendered":"

This handy Spectrum Math Grade 4 Answer Key Chapter 1 Lesson 1.1 Adding 1- and 2-Digit Numbers\u00a0provides detailed answers for the workbook questions. Spectrum Math Grade 4 Chapter 1 Lesson 1.1 Adding 1- and 2-Digit Numbers Answers Key Adding and Subtracting 1 and 2 Digits If 6 + 3 = 9, then 60 + 30 … Read more<\/a><\/p>\n","protected":false},"author":14,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[641],"tags":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/ccssanswers.com\/wp-json\/wp\/v2\/posts\/150659"}],"collection":[{"href":"https:\/\/ccssanswers.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ccssanswers.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ccssanswers.com\/wp-json\/wp\/v2\/users\/14"}],"replies":[{"embeddable":true,"href":"https:\/\/ccssanswers.com\/wp-json\/wp\/v2\/comments?post=150659"}],"version-history":[{"count":8,"href":"https:\/\/ccssanswers.com\/wp-json\/wp\/v2\/posts\/150659\/revisions"}],"predecessor-version":[{"id":161680,"href":"https:\/\/ccssanswers.com\/wp-json\/wp\/v2\/posts\/150659\/revisions\/161680"}],"wp:attachment":[{"href":"https:\/\/ccssanswers.com\/wp-json\/wp\/v2\/media?parent=150659"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ccssanswers.com\/wp-json\/wp\/v2\/categories?post=150659"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ccssanswers.com\/wp-json\/wp\/v2\/tags?post=150659"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}