Unit 2: Decimals Test 6 NBT.7 (Divide Decimals): Homework/Study Guide October 29 – November 2,
2012
Example 1. You can use a decimal model to divide decimals. Find the quotient: 0.2 ÷ 5 = ⃝
Strategy: Use a model. Use a 10 by 10 grid. (1) Shade 0.2 of the model. (2) Use circles to
separate the shaded area into 5 equal groups. (3) Count the number of squares in each group.
There are 4 squares in each group. Four squares represents 4 hundredths, or 0.04.
Solution:
0.2 ÷ 5 = 0.04
1
1
2
2
3
3
4
4
5
5
1
1
2
2
3
3
4
4
5
5
Example 2. Mrs. Collins bought 8 towels for $66.24. Each towel was the same price. What the
price of one towel?
Strategy: Write an equation for the problem. Then divide from left to right.
Let p represent the price of one towel.
$66.24 ÷ 8 = p Solution: The price of one
towel is $8.28.
Monday, October 29, 2012 (1-5): Parent Signature:
___________________________________________ _
1. Find the quotient. Use the grid to help you divide. 0.4 ÷
5=⃝
(A)
8
(B)
0.8
(C)
0.08
(D)
0.008
2. Find the quotient.
(D) 0.293
175.8 ÷ 6 = ⃝
3. Find the quotient. 0.65 ÷ 0.25 = ⃝
(D) 26
(A) 293
(B) 29.3
(C) 2.93
(A) 0.026
(B) 0.26
(C) 2.6
4. It took Neal 2.4 hours to run 19.8 miles last Sunday while training for a marathon. What
was his average speed?
(A) 7.5 miles per hour
(B) 7.75 miles per hour
(C) 8.25 miles per hour
(D) 8.5 miles per hour
5. Breunnia bought 1.2 pounds of turkey breast at the deli counter. She paid $8.34 for the
turkey. What was the price per pound of the turkey? (A) $6.24
(B) $6.31
(C) $6.90
(D) $6.95
Estimate the quotients. You can use multiples and compatible numbers to estimate decimal
quotients. Estimate. 249.7 ÷ 31 = ⃝
Step 1: Round the divisor, 31 to the nearest 10.
31 rounded to the nearest ten is 30.
Step 2: Find the multiples of 30 that the dividend, 249.7 is between. 249.7 is between 240
and 270.
Step 3: Divide each multiple by the rounded divisor, 30. 240 ÷ 30 = 8
270 ÷ 30 = 9
So, two possible estimates are 8 and 9.
Tuesday, October 30, 2012 (6-10): Parent Signature:
___________________________________________
6. Use compatible numbers to estimate the quotient. 23.6 ÷ 7 = ⃝
________ ÷ _________ = __________
7. Use multiples to estimate the quotient. 338.7 ÷ 49 = ⃝
8. Divide. 7.7 ÷ 1.4 = ⃝
(A) 4.5
(B) 5.5
9. Divide. Use decimal models. 0.15 ÷ 0.03 = ⃝
(C) 5.05
(D) 5.005
10. Divide. Find the quotient. 8.54 ÷ 4 = ⃝
(A) 2.135
(B) 2.035
(C) 1.135
(D) 2.200
Wednesday, October 31, 2012 (11-15): Parent Signature:
_______________________________________
11. Trinady spends $9.45 on 5 greeting cards. Each card costs the same amount. What is the
cost of one greeting card? ________________
12. Damon kayaks on a river near his home. He plans to kayak a total of 6.4 miles. Damon
kayaks at an average speed of 1.6 miles per hour. How many hours will it take Damon to
kayak the 6.4 miles?
13. Use compatible numbers to estimate the quotient. 469.4 ÷ 62 = ⃝
________ ÷ _________ = _________
14. Use multiples to estimate the quotient. 75.1 ÷ 9 = ⃝
15. Divide. Use decimal models. 0.52 ÷
0.26 = ⃝
Thursday, November 1, 2012 (16-20): Parent Signature:
_______________________________________
Divide. You will have to add “imaginary zeros or place holders” in order to complete the
answer. You will not have remainders.
16)
17)
97.3 ÷ 35 = ⃝
(A) 278
20.78
(B) 2.78
(C) 27.8
(D)
7.8 ÷ 15 = ⃝
(A) 0.052
0.52
(B) 50.2
(C) 5.2
(D)
18)
49 ÷ 14 = ⃝
(A) 3.5
30.5
19) 1.14 ÷ 0.76 = ⃝
(A) 10.5
15
7.59 ÷ 2.2 = ⃝
(A) 345
(B) 35
(C) 3.05
(D)
(B) 1.05
(C) 1.5
(D)
(B) 3.45
(C) 34.5
(D) 3.045