Practice with the help of **Spectrum Math Grade 5 Answer Key Chapter 3 Lesson 3.12 Division Practice** regularly and improve your accuracy in solving questions.

## Spectrum Math Grade 5 Chapter 3 Lesson 3.12 Division Practice Answers Key

To make the divisor into a whole number, move the decimal point in the divisor and the dividend the same number of places to the right.

**Divide.**

Question 1.

a.

Answer:

Change the divisor 0.03 to a whole number by moving the decimal point 2 places to the right. Then move the decimal point in the dividend the same, 2 places to the right.

We then have the equations:

4560 ÷ 3 = 1,520

and therefore:

45.6 ÷ 0.03 = 1,520

Both were calculated to 3 decimal places.

b.

Answer:

Change the divisor 1.7 to a whole number by moving the decimal point 1 place to the right. Then move the decimal point in the dividend the same, 1 place to the right.

We then have the equations:

204 ÷ 17 = 12.000

and therefore:

20.4 ÷ 1.7 = 12.000

Both were calculated to 3 decimal places.

c.

Answer:

Change the divisor 3.8 to a whole number by moving the decimal point 1 place to the right. Then move the decimal point in the dividend the same, 1 place to the right.

We then have the equations:

167.2 ÷ 38 = 4.400

and therefore:

16.72 ÷ 3.8 = 4.400

Both were calculated to 3 decimal places.

d.

Answer:

Change the divisor 0.5 to a whole number by moving the decimal point 1 place to the right. Then move the decimal point in the dividend the same, 1 place to the right.

We then have the equations:

18.7 ÷ 5 = 3.740

and therefore:

1.87 ÷ 0.5 = 3.740

Both were calculated to 3 decimal places.

Question 2.

a.

Answer:

Change the divisor 7.4 to a whole number by moving the decimal point 1 place to the right. Then move the decimal point in the dividend the same, 1 place to the right.

We then have the equations:

288.6 ÷ 74 = 3.900

and therefore:

28.86 ÷ 7.4 = 3.900

Both were calculated to 3 decimal places.

b.

Answer:

Change the divisor 1.07 to a whole number by moving the decimal point 2 places to the right. Then move the decimal point in the dividend the same, 2 places to the right.

We then have the equations:

6741 ÷ 107 = 63

and therefore:

67.41 ÷ 1.07 = 63

Both were calculated to 3 decimal places.

c.

Answer:

Change the divisor 0.22 to a whole number by moving the decimal point 2 places to the right. Then move the decimal point in the dividend the same, 2 places to the right.

We then have the equations:

803 ÷ 22 = 36.5

and therefore:

8.03 ÷ 0.22 = 36.5

Both were calculated to 3 decimal places.

d.

Answer:

Change the divisor 0.15 to a whole number by moving the decimal point 2 places to the right. Then move the decimal point in the dividend the same, 2 places to the right.

We then have the equations:

99 ÷ 15 = 6.6

and therefore:

0.99 ÷ 0.15 = 6.6

Both were calculated to 3 decimal places.

Question 3.

a.

Answer:

Change the divisor 0.08 to a whole number by moving the decimal point 2 places to the right. Then move the decimal point in the dividend the same, 2 places to the right.

We then have the equations:

252 ÷ 8 = 31.500

and therefore:

2.52 ÷ 0.08 = 31.500

Both were calculated to 3 decimal places.

b.

Answer:

Change the divisor 0.02 to a whole number by moving the decimal point 2 places to the right. Then move the decimal point in the dividend the same, 2 places to the right.

We then have the equations:

656 ÷ 2 = 328

and therefore:

6.56 ÷ 0.02 = 328

Both were calculated to 3 decimal places.

c.

Answer:

Change the divisor 1.5 to a whole number by moving the decimal point 1 place to the right. Then move the decimal point in the dividend the same, 1 place to the right.

We then have the equations:

84 ÷ 15 = 5.6

and therefore:

8.4 ÷ 1.5 = 5.6

Both were calculated to 3 decimal places.

d.

Answer:

Change the divisor 6.4 to a whole number by moving the decimal point 1 place to the right. Then move the decimal point in the dividend the same, 1 place to the right.

We then have the equations:

270.4 ÷ 64 = 4.225

and therefore:

27.04 ÷ 6.4 = 4.225

Both were calculated to 3 decimal places.

Question 4.

a.

Answer:

Change the divisor 0.65 to a whole number by moving the decimal point 2 places to the right. Then move the decimal point in the dividend the same, 2 places to the right.

We then have the equations:

91 ÷ 65 = 1.4

and therefore:

0.91 ÷ 0.65 = 1.4

Both were calculated to 3 decimal places.

b.

Answer:

Change the divisor 0.08 to a whole number by moving the decimal point 2 places to the right. Then move the decimal point in the dividend the same, 2 places to the right.

We then have the equations:

17 ÷ 8 = 2.125

and therefore:

0.17 ÷ 0.08 = 2.125

Both were calculated to 3 decimal places.

c.

Answer:

Change the divisor 0.17 to a whole number by moving the decimal point 2 places to the right. Then move the decimal point in the dividend the same, 2 places to the right.

We then have the equations:

306 ÷ 17 = 18.000

and therefore:

3.06 ÷ 0.17 = 18.000

Both were calculated to 3 decimal places.

d.

Answer:

Change the divisor 2.1 to a whole number by moving the decimal point 1 place to the right. Then move the decimal point in the dividend the same, 1 place to the right.

We then have the equations:

33.6 ÷ 21 = 1.600

and therefore:

3.36 ÷ 2.1 = 1.600

Both were calculated to 3 decimal places.