Practice with the help of Spectrum Math Grade 1 Answer Key Chapter 1 Posttest regularly and improve your accuracy in solving questions.
Spectrum Math Grade 1 Chapter 1 Posttest Answers Key
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Add.
1.
Answer:
Addition:
Explanation:
4 + 1 = 5.
=> Four plus one equals five.
2.
Answer:
Addition:
Explanation:
5 + 1 = 6.
=> Five plus one equals six.
3.
Answer:
Addition:
Explanation:
3 + 2 = 5.
=> Three plus two equals five.
4.
Answer:
Addition:
Explanation:
2 + 4 = 6.
=> Two plus four equals six.
5.
Answer:
Addition:
Explanation:
3 + 0 = 3.
=> Three plus zero equals three.
6.
Answer:
Addition:
Explanation:
1 + 3 = 4.
=> One plus three equals four.
7.
Answer:
Addition:
Explanation:
0 + 6 = 6.
=> Zero plus six equals six.
8.
Answer:
Addition:
Explanation:
3 + 1 = 4.
=> Three plus one equals four.
9.
Answer:
Addition:
Explanation:
2 + 2 = 4.
=> Two plus two equals four.
10.
Answer:
Addition:
Explanation:
1 + 0 = 1.
=> One plus zero equals one.
11.
Answer:
Addition:
Explanation:
3 + 3 = 6.
=> Three plus three equals six.
12.
Answer:
Addition:
Explanation:
2 + 3 = 5.
=> Two plus three equals five.
13.
Answer:
Addition:
Explanation:
4 + 0 = 4.
=> Four plus zero equals four.
14.
Answer:
Addition:
Explanation:
1 + 2 = 3.
=> One plus two equals three.
15.
Answer:
Addition:
Explanation:
0 + 5 = 5.
=> Zero plus five equals five.
16.
Answer:
Addition:
Explanation:
1 + 1 = 2.
=> One plus one equals two.
17.
Answer:
Addition:
Explanation:
4 + 2 = 6.
=> Four plus two equals six.
18.
Answer:
Addition:
Explanation:
6 + 0 = 6.
=> Six plus zero equals six.
Subtract.
19.
Answer:
Subtraction:
Explanation:
3 – 0 = 3.
=> Three minus zero equals three.
20.
Answer:
Subtraction:
Explanation:
6 – 1 = 5.
=> Six minus one equals five.
21.
Answer:
Subtraction:
Explanation:
4 – 4 = 0.
=> Four minus four equals zero.
22.
Answer:
Subtraction:
Explanation:
5 – 2 = 3.
=> Five minus two equals three.
23.
Answer:
Subtraction:
Explanation:
3 – 2 = 1.
=> Three minus two equals one.
24.
Answer:
Subtraction:
Explanation:
6 – 0 = 6.
=> Six minus zero equals six.
25.
Answer:
Subtraction:
Explanation:
6 – 4 = 2.
=> Six minus four equals two.
26.
Answer:
Subtraction:
Explanation:
5 – 3 = 2.
=> Five minus three equals two.
27.
Answer:
Subtraction:
Explanation:
2 – 0 = 2.
=> Two minus zero equals two.
28.
Answer:
Subtraction:
Explanation:
6 – 3 = 3.
=> Six minus three equals three.
29.
Answer:
Subtraction:
Explanation:
5 – 5 = 0.
=> Five minus five equals zero.
30.
Answer:
Subtraction:
Explanation:
4 – 3 = 1.
=> Four minus three equals one.
31.
Answer:
Subtraction:
Explanation:
4 – 1 = 3.
=> Four minus one equals three.
32.
Answer:
Subtraction:
Explanation:
5 – 4 = 1.
=> Five minus four equals one.
33.
Answer:
Subtraction:
Explanation:
6 – 2 = 4.
=> Six minus two equals four.
34.
Answer:
Subtraction:
Explanation:
2 – 1 = 1.
=> Two minus one equals one.
35.
Answer:
Subtraction:
Explanation:
5 – 1 = 4.
=> Five minus one equals four.
36.
Answer:
Subtraction:
Explanation:
6 – 6 = 0.
=> Six minus six equals zero.
Solve each problem.
37. There are 2 
.
Then 3 more come.
Add to find the sum. _____
Answer:
Total number of lions = 5.
Explanation:
Number of lions = 2.
Number of lions more came = 3.
Addition:
Total number of lions = Number of lions + Number of lions more came
= 2 + 3
= 5.
38. There are 5 
.
2 fly away.
How many are left? _____
Answer:
Number of crows left = 7.
Explanation:
Number of crows there = 5.
Number of crows flew away = 2.
Addition:
Number of crows left = Number of crows there + Number of crows flew away
= 5 + 2
= 7.
39. Nate has 4 
.
Jane has 1 .
What is the difference? _____
Answer:
The difference is 3 between balloons Nate has and Jane has.
Explanation:
Number of balloons Nate has = 4.
Number of balloons Jane has = 1.
Subtraction:
Difference:
Number of balloons Nate has – Number of balloons Jane has
= 4 – 1
= 3.
40. I have 3 
I buy 3 more
What is 3 plus 3?_______
Answer:
Total number of hats I have now = 6.
3 plus 3 equals 6.
Explanation:
Number of hats I have = 3.
Number of hats I bought more = 3.
Addition:
Total number of hats I have now = Number of hats I have + Number of hats I bought more
= 3 + 3
= 6.
41. There are 6 
.
5 walk away.
What is 6 minus 5? ____
Answer:
Number of hippos left = 1.
6 minus 5 equals 1.
Explanation:
Number of hippos there = 6.
Number of hippos walk away = 5.
Subtraction:
Number of hippos left = Number of hippos there – Number of hippos walk away
= 6 – 5
= 1.
42. There are 3 
.
Then, 1 more comes.
How many in all? ______
Answer:
Total number of peacocks there now = 4.
Explanation:
Number of peacocks = 3.
Number of peacocks came more = 1.
Subtraction:
Total number of peacocks there now = Number of peacocks + Number of peacocks came more
= 3 + 1
= 4.
Add.
43.
Answer:
Addition:
Explanation:
4 + 5 = 9.
=> Four plus five equals nine.
44.
Answer:
Addition:
Explanation:
0 + 7 = 7.
=> Zero plus seven equals seven.
45.
Answer:
Addition:
Explanation:
2 + 6 = 8.
=> Two plus six equals eight.
46.
Answer:
Addition:
Explanation:
8 + 2 = 10.
=> Eight plus two equals ten.
47.
Answer:
Addition:
Explanation:
5 + 5 = 10.
=> Five plus five equals ten.
48.
Answer:
Addition:
Explanation:
1 + 8 = 9.
=> One plus eight equals nine.
49.
Answer:
Addition:
Explanation:
7 + 2 = 9.
=> Seven plus two equals nine.
50.
Answer:
Addition:
Explanation:
1 + 9 = 10.
=> One plus nine equals ten.
51.
Answer:
Addition:
Explanation:
3 + 5 = 8.
=> Three plus five equals eight.
52.
Answer:
Addition:
Explanation:
6 + 1 = 7.
=> Six plus one equals seven.
53.
Answer:
Addition:
Explanation:
8 + 0 = 8.
=> Eight plus zero equals eight.
54.
Answer:
Addition:
Explanation:
3 + 7 = 10.
=> Three plus seven equals ten.
55.
Answer:
Addition:
Explanation:
6 + 3 = 9.
=> Six plus three equals nine.
56.
Answer:
Addition:
Explanation:
4 + 4 = 8.
=> Four plus four equals eight.
57.
Answer:
Addition:
Explanation:
5 + 2 = 7.
=> Five plus second equals seven.
58.
Answer:
Addition:
Explanation:
10 + 0 = 10.
=> Ten plus zero equals ten.
59.
Answer:
Addition:
Explanation:
7 + 1 = 8.
=> Seven plus one equals eight.
60.
Answer:
Addition:
Explanation:
4 + 3 = 7.
=> Four plus three equals seven.
Subtract.
61.
Answer:
Subtraction:
Explanation:
9 – 7 = 2.
=> Nine minus seven equals two.
62.
Answer:
Subtraction:
Explanation:
10 – 0 = 10.
=> Ten minus zero equals ten.
63.
Answer:
Subtraction:
Explanation:
10 – 6 = 4.
=> Ten minus six equals four.
64.
Answer:
Subtraction:
Explanation:
7 – 3 = 4.
=> Seven minus three equals four.
65.
Answer:
Subtraction:
Explanation:
8 – 8 = 0.
=> Eight minus eight equals zero.
66.
Answer:
Subtraction:
Explanation:
9 – 6 = 3.
=> Nine minus six equals three.
67.
Answer:
Subtraction:
Explanation:
10 – 2 = 8.
=> Ten minus two equals eight.
68.
Answer:
Subtraction:
Explanation:
9 – 1 = 8.
=> Nine minus one equals eight.
69.
Answer:
Subtraction:
Explanation:
9 – 4 = 5.
=> Nine minus four equals five.
70.
Answer:
Subtraction:
Explanation:
8 – 5 = 3.
=> Eight minus five equals three.
71.
Answer:
Subtraction:
Explanation:
8 – 3 = 5.
=> Eight minus three equals five.
72.
Answer:
Subtraction:
Explanation:
7 – 2 = 5.
=> Seven minus two equals five.
73.
Answer:
Subtraction:
Explanation:
7 – 6 = 1.
=> Seven minus six equals one.
74.
Answer:
Subtraction:
Explanation:
9 – 9 = 0.
=> Nine minus nine equals zero.
75.
Answer:
Subtraction:
Explanation:
10 – 7 = 3.
=> Ten minus seven equals three.
76.
Answer:
Subtraction:
Explanation:
8 – 0 = 8.
=> Eight minus zero equals eight.
77.
Answer:
Subtraction:
Explanation:
10 – 4 = 6.
=> Ten minus four equals six.
78.
Answer:
Subtraction:
Explanation:
9 – 2 = 7.
=> Nine minus two equals seven.
Solve each problem.
79. There are 8 
There are 2 
How many more 
than 
are there? _____
Answer:
There are 3 more cats than dogs.
Explanation:
Number of cats there = 8.
Number of dogs there = 2.
Subtraction:
Difference:
Number of cats there – Number of dogs there
= 8 – 2
= 6.
80. Dan buys 
for 7⊄.
He buýs 
for 3⊄.
How much money did he spend? _____ ⊄
Answer:
Total amount he spends = 10⊄.
Explanation:
Cost of lorries Dan buys = 7⊄.
Cost of cars Dan buys = 3⊄.
Addition:
Total amount he spends = Cost of lorries Dan buys + Cost of cars Dan buys
= 7⊄ + 3⊄
= 10⊄.
81. There are 9 
Rachel eats 1 .
How many are left? _______
Answer:
Number of bananas left = 8.
Explanation:
Number of bananas there = 9.
Number of bananas Rachel eats = 1.
Subtraction:
Number of bananas left = Number of bananas there – Number of bananas Rachel eats
= 9 – 1
= 8.
82. There are 4 
.
3 more come.
What is the sum? _________
Answer:
Total number of crows there now = 7.
Explanation:
Number of crows there = 4.
Number of crows came more = 3.
Addition:
Total number of crows there now = Number of crows there + Number of crows came more
= 4 + 3
= 7.
83. Celia has 10⊄.
She buys 
for 8⊄.
How much money does she have left? ____ ⊄
Answer:
Amount of money Celia has left = 2⊄.
Explanation:
Amount of money Celia has = 10⊄.
Cost of toys she buys = 8⊄.
Subtraction:
Amount of money Celia has left = Amount of money Celia has – Cost of toys she buys
= 10⊄ – 8⊄
= 2⊄.
84. Jal has 5⊄.
He finds 3⊄ more.
How much money does he have? ____ ⊄
Answer:
Amount of money Jal has now = 8⊄.
Explanation:
Amount of money Jal has = 5⊄.
Amount of money Jal finds more = 3⊄.
Addition:
Amount of money Jal has now = Amount of money Jal has + Amount of money Jal finds more
= 5⊄ + 3⊄
= 8⊄.