This handy **Spectrum Math Grade 4 Answer Key Chapter 1 Lesson 1.3 Adding Three or More Numbers (Single Digit)** provides detailed answers for the workbook questions.

## Spectrum Math Grade 4 Chapter 1 Lesson 1.3 Adding Three or More Numbers (Single Digit) Answers Key

**Add.**

Question 1.

a.

Answer:

Explanation:

Adding the first two digits of ones, 3 and 4 gives 7

Then adding 7 to the third digit 5 of ones, gives 12

So, the sum of addends 3 , 4 and 5 is 12

3 + 4 = 7 + 5 = 12

b.

Answer:

Explanation:

Adding the first two digits of ones, 2 and 6 gives 8

Then adding 8 to the third digit 3 of ones, gives 11

So, the sum of addends 2, 6 and 3 is 11

2 + 6 = 8 + 3 = 11

c.

Answer:

Explanation:

Adding the first two digits of ones, 7 and 5 gives 12

Then adding 12 to the third digit 3 of ones, gives 15

So, the sum of addends 7 , 5 and 3 is 15

7 + 5 = 12 + 3 = 15

d.

Answer:

Explanation:

Adding the first two digits of ones, 6 and 3 gives 9

Then adding 9 to the third digit 7 of ones, gives 16

So, the sum of addends 6, 3 and 7 is 16

6 + 3 = 9 + 7 = 16

e.

Answer:

Explanation:

Adding the first two digits of ones, 8 and 7 gives 15

Then adding 15 to the third digit 2 of ones, gives 17

So, the sum of addends 8, 7 and 2 is 17

8 + 7 = 15 + 2 = 17

f.

Answer:

Explanation:

Adding the first two digits of ones, 9 and 8 gives 17

Then adding 17 to the third digit 1 of ones, gives 18

So, the sum of addends 9, 8 and 1 is 18

9 + 8 = 17 + 1 = 18

g.

Answer:

Explanation:

Adding the first two digits of ones, 3 and 6 gives 9

Then adding 9 to the third digit 8 of ones, gives 17

So, the sum of addends 3, 6 and 8 is 17

3 + 6 = 9 + 8 = 17

h.

Answer:

Explanation:

Adding the first two digits of ones, 1 and 7 gives 8

Then adding 8 to the third digit 6 of ones, gives 14

So, the sum of addends 1, 7 and 6 is 14

1 + 7 = 8 + 6 = 14

Question 2.

a.

Answer:

Explanation:

Adding the first two digits of ones, 4 and 6 gives 10

Then adding 10 to the third digit 8 of ones, gives 18

So, the sum of addends 4, 6 and 8 is 18

4 + 6 = 10 + 8 = 18

b.

Answer:

Explanation:

Adding the first two digits of ones, 3 and 5 gives 8

Then adding 8 to the third digit 2 of ones, gives 10

So, the sum of addends 3, 5 and 2 is 10

3 + 5 = 8 + 2 = 10

c.

Answer:

Explanation:

Adding the first two digits of ones, 1 and 5 gives 6

Then adding 6 to the third digit 7 of ones, gives 13

So, the sum of addends 1, 5 and 7 is 13

1+ 5 = 6 + 7 = 13

d.

Answer:

Explanation:

Adding the first two digits of ones, 8 and 5 gives 13

Then adding 13 to the third digit 3 of ones, gives 16

So, the sum of addends 8, 5 and 3 is 16

8 + 5 = 13 + 3 = 16

e.

Answer:

Explanation:

Adding the first two digits of ones, 4 and 7 gives 11

Then adding 11 to the third digit 8 of ones, gives 19

So, the sum of addends 4, 7 and 8 is 19

4 + 7 = 11 + 8 = 19

f.

Answer:

Explanation:

Adding the first two digits of ones, 3 and 8 gives 11

Then adding 11 to the third digit 9 of ones, gives 20

So, the sum of addends 3, 8 and 9 is 20

3 + 8 = 11 + 9 = 20

g.

Answer:

Explanation:

Adding the first two digits of ones, 2 and 6 gives 8

Then adding 8 to the third digit 9 of ones, gives 17

So, the sum of addends 2, 6 and 9 is 17

2 + 6 = 8 + 9 = 17

h.

Answer:

Explanation:

Adding the first two digits of ones, 3 and 3 gives 6

Then adding 6 to the third digit 7 of ones, gives 13

So, the sum of addends 3, 3 and 7 is 13

3 + 3 = 6 + 7 = 13

Question 3.

a.

Answer:

Explanation:

Adding the first two digits of ones, 8 and 7 gives 15

Then adding 15 to the third digit 5 of ones, gives 20

So, the sum of addends 8, 7 and 5 is 20

8 + 7 = 15 + 5 = 20

b.

Answer:

Explanation:

Adding the first two digits of ones, 8 and 3 gives 11

Then adding 11 to the third digit 5 of ones, gives 16

So, the sum of addends 8, 6 and 5 is 16

8 + 3 = 11 + 5 = 16

c.

Answer:

Explanation:

Adding the first two digits of ones, 3 and 8 gives 11

Then adding 11 to the third digit 2 of ones, gives 13

So, the sum of addends 3, 8 and 2 is 13

3 + 8 = 11 + 2 = 13

d.

Answer:

Explanation:

Adding the first two digits of ones, 2 and 8 gives 10

Then adding 10 to the third digit 6 of ones, gives 16

So, the sum of addends 2, 8 and 6 is 16

2 + 8 = 10 + 6 = 16

e.

Answer:

Explanation:

Adding the first two digits of ones, 6 and 7 gives 13

Then adding 13 to the third digit 8 of ones, gives 21

So, the sum of addends 6, 7 and 8 is 21

6 + 7 = 13 + 8 = 21

f.

Answer:

Explanation:

Adding the first two digits of ones, 3 and 6 gives 9

Then adding 9 to the third digit 9 of ones, gives 18

So, the sum of addends 3, 6 and 9 is 18

3 + 6 = 9 + 9 = 18

g.

Answer:

Explanation:

Adding the first two digits of ones, 1 and 8 gives 9

Then adding 9 to the third digit 7 of ones, gives 16

So, the sum of addends 1, 8 and 7 is 16

1 + 8 = 9 + 7 = 16

h.

Answer:

Explanation:

Adding the first two digits of ones, 5 and 7 gives 12

Then adding 12 to the third digit 9 of ones, gives 21

So, the sum of addends 5 , 7 and 9 is 21

5 + 7 = 12 + 9 = 21

Question 4.

a.

Answer:

Explanation:

Adding the first two digits of ones, 1 and 3 gives 4

Then adding 4 to the third digit 5 of ones, gives 9

Then adding 9 to the fourth digit 7 of ones, gives 16

So, the sum of addends 1, 3, 5 and 7 is 16

1 + 3= 4 + 5 = 9 + 7 = 16

b.

Answer:

Explanation:

Adding the first two digits of ones, 2 and 6 gives 8

Then adding 8 to the third digit 7 of ones, gives 15

Then adding 15 to the fourth digit 4 of ones, gives 19

So, the sum of addends 2, 6, 7 and 4 is 19

2 + 6 = 8 + 7 = 15 + 4 = 19

c.

Answer:

Explanation:

Adding the first two digits of ones, 1 and 5 gives 6

Then adding 6 to the third digit 9 of ones, gives 15

Then adding 15 to the fourth digit 7 of ones, gives 22

So, the sum of addends 1, 5, 9 and 7 is 22

1 + 5 = 6 + 9 = 15 + 7 = 22

d.

Answer:

Explanation:

Adding the first two digits of ones, 3 and 5 gives 8

Then adding 8 to the third digit 4 of ones, gives 12

Then adding 12 to the fourth digit 6 of ones, gives 18

So, the sum of addends 3, 5, 4 and 6 is 18

3 + 5 = 8 + 4 =12+ 6 = 18

e.

Answer:

Explanation:

Adding the first two digits of ones, 2 and 2 gives 4

Then adding 4 to the third digit 2 of ones, gives 6

Then adding 6 to the fourth digit 8 of ones, gives 14

So, the sum of addends 2, 2 , 2 and 8 is 14

2 + 2 = 4 + 2 = 6 + 8 = 14

f.

Answer:

Explanation:

Adding the first two digits of ones, 1 and 7 gives 8

Then adding 8 to the third digit 8 of ones, gives 16

Then adding 16 to the fourth digit 9 of ones, gives 25

So, the sum of addends 1, 7, 8 and 9 is 25

1 + 7 = 8 + 8 = 16 + 9 = 25

g.

Answer:

Explanation:

Adding the first two digits of ones, 4 and 4 gives 8

Then adding 8 to the third digit 5 of ones, gives 13

Then adding 13 to the fourth digit 6 of ones, gives 19

So, the sum of addends 4, 4 , 5 and 6 is 19

4 + 4 = 8 + 5 = 13 + 6 = 19

h.

Answer:

Explanation:

Adding the first two digits of ones, 3 and 4 gives 7

Then adding 7 to the third digit 6 of ones, gives 13

Then adding 13 to the fourth digit 8 of ones, gives 21

So, the sum of addends 3, 4 , 6 and 8 is 21

3 + 4 = 7 + 6 = 13 + 8 = 21

Question 5.

a.

Answer:

Explanation:

Adding the first two digits of ones, 2 and 6 gives 8

Then adding 8 to the third digit 4 of ones, gives 12

Then adding 12 to the fourth digit 8 of ones, gives 20

So, the sum of addends 2, 6, 4 and 8 is 20

2 + 4 = 8 + 4 = 12 + 8 = 20

b.

Answer:

Explanation:

Adding the first two digits of ones, 2 and 2 gives 4

Then adding 4 to the third digit 8 of ones, gives 12

Then adding 12 to the fourth digit 7 of ones, gives 19

So, the sum of addends 2, 2 ,8 and 7 is 19

2 + 2 = 4 + 8 = 12 + 7 = 19

c.

Answer:

Explanation:

Adding the first two digits of ones, 4 and 5 gives 9

Then adding 9 to the third digit 7 of ones, gives 16

Then adding 16 to the fourth digit 9 of ones, gives 25

So, the sum of addends 4, 5, 7 and 9 is 25

4 + 5 = 9 + 7 = 16 + 9 = 25

d.

Answer:

Explanation:

Adding the first two digits of ones, 3 and 3 gives 6

Then adding 6 to the third digit 4 of ones, gives 10

Then adding 10 to the fourth digit 4 of ones, gives 14

So, the sum of addends 3, 3 , 4 and 4 is 14

3 + 3 = 6 + 4 = 10 + 4 = 14

e.

Answer:

Explanation:

Adding the first two digits of ones, 5 and 5 gives 10

Then adding 10 to the third digit 4 of ones, gives 14

Then adding 14 to the fourth digit 3 of ones, gives 17

So, the sum of addends 5, 5 , 4 and 3 is 17

5 + 5 = 10 + 4 = 14 + 3 = 17

f.

Answer:

Explanation:

Adding the first two digits of ones, 6 and 3 gives 9

Then adding 9 to the third digit 7 of ones, gives 16

Then adding 16 to the fourth digit 1 of ones, gives 17

So, the sum of addends 6, 3 , 7 and 1 is 17

6 + 3 = 9 + 7 = 16 + 1 = 17

g.

Answer:

Explanation:

Adding the first two digits of ones, 5 and 4 gives 9

Then adding 9 to the third digit 8 of ones, gives 17

Then adding 17 to the fourth digit 9 of ones, gives 26

So, the sum of addends 5, 4 , 8 and 9 is 26

5 + 4 = 9 + 8 = 17 + 9 = 26

h.

Answer:

Explanation:

Adding the first two digits of ones, 1 and 7 gives 8

Then adding 8 to the third digit 1 of ones, gives 9

Then adding 9 to the fourth digit 9 of ones, gives 18

So, the sum of addends 1, 7 ,1 and 9 is 18

1 + 7 = 8 + 1 = 9 + 9 = 18

Question 6.

a.

Answer:

Explanation:

Adding the first two digits of ones, 9 and 1 gives 10

Then adding 10 to the third digit 7 of ones, gives 17

Then adding 17 to the fourth digit 2 of ones, gives 19

So, the sum of addends 9, 1 , 7 and 2 is 19

9 + 1 = 10 + 7 = 17 + 2 = 19

b.

Answer:

Explanation:

Adding the first two digits of ones, 3 and 4 gives 7

Then adding 7 to the third digit 7 of ones, gives 14

Then adding 14 to the fourth digit 8 of ones, gives 22

So, the sum of addends 3 , 4, 7 and 8 is 22

3 + 4 = 7 + 7 = 14 + 8 = 22

c.

Answer:

Explanation:

Adding the first two digits of ones, 2 and 5 gives 7

Then adding 7 to the third digit 7 of ones, gives 14

Then adding 14 to the fourth digit 4 of ones, gives 18

So, the sum of addends 2, 5 , 7 and 4 is 18

2 + 5 = 7 + 7 = 14 + 4 = 18

d.

Answer:

Explanation:

Adding the first two digits of ones, 5 and 3 gives 8

Then adding 8 to the third digit 6 of ones, gives 14

Then adding 14 to the fourth digit 5 of ones, gives 19

So, the sum of addends 5, 3 , 6 and 5 is 19

5 + 3 = 8 + 6 =14 + 5 = 19

e.

Answer:

Explanation:

Adding the first two digits of ones, 8 and 3 gives 11

Then adding 11 to the third digit 9 of ones, gives 20

Then adding 20 to the fourth digit 2 of ones, gives 22

So, the sum of addends 8, 3 , 9 and 2 is 22

8 + 3 = 11+ 9= 20 + 2 = 22

f.

Answer:

Explanation:

Adding the first two digits of ones, 4 and 6 gives 10

Then adding 10 to the third digit 8 of ones, gives 18

Then adding 18 to the fourth digit 3 of ones, gives 21

So, the sum of addends 4, 6 , 8 and 3 is 21

4 + 6 = 10 + 8 =18 + 3 =21

g.

Answer:

Explanation:

Adding the first two digits of ones, 7 and 3 gives 10

Then adding 10 to the third digit 7 of ones, gives 17

Then adding 17 to the fourth digit 3 of ones, gives 20

So, the sum of addends 7, 3, 7 and 3 is 20

7 + 3 = 10 + 7 = 17 + 3 =20

h.

Answer:

Explanation:

Adding the first two digits of ones, 2 and 1 gives 3

Then adding 3 to the third digit 8 of ones, gives 11

Then adding 11 to the fourth digit 5 of ones, gives 16

So, the sum of addends 2, 1, 8 and 5 is 16

2 + 1 = 3 + 8 = 11 + 5 = 16