# Spectrum Math Grade 5 Chapter 3 Lesson 12 Answer Key Division Practice

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.