Name ______Date ______Number ______
Mid Unit 3 Study Guide: Multiplication with Decimal Numbers
1. Find the product:
32.87 x 10² = ______8. Solve: 3.16
x 0.7
2. Find the product:
135 x 10¹ = ______
3. Find the product:
18.65 x 10³ = ______9. Solve: 6.21
x 0.86
4. Which of the following is correct?
14.21 x 0.1 =
a. 1.421
b. 14.21
c. 142.1
d. 1,421
5. Which of the following is correct? 10. Solve: 0.12
67.4 x 0.1 = x 6.2
a. 674
b. 67.4
c. 6.74
d. 0.674
11. Solve: 7.1 x 2.9 =
6. Which of the following is correct?
25.84 x 100?
a. 25.84
b. 258.4
c. 2,584
d. 25,840
7. Solve: 0.45 x 4.2 =
12. Use the hundredths grid to solve
the following : 0.4 x 0.3 =
**Hint: shade 4 tenths going horizontal and 3 tenths going vertical. The answer is where they overlap.
13. Use the hundredths grid to solve
the following: 0.15 x 4 =
*Hint: 4 groups of 15 hundredths
14. If your boat takes 2.4 gallons to
be full, how much will it cost to fill your
boat if each gallon is $3.15?
15. A store has a contest to guess the weight
of 100 pieces buttons in a jar.
If each button weighs
0.014 ounces, what is the total weight
of all the buttons?
a. 1,400 ounces c. 14 ounces
b. 140 ounces d. 1.4 ounces
16. Jill and her friend eat lunch
at a restaurant. To determine
how much money to leave as
a tip, she multiplies the bill by
0.18. How much money should
she leave as a tip if the bill is
$35?
a. $6.50
b. $6.70
c. $6.30
d. $6.00
17. Which of the following provides
the best estimate for 0.49 x 0.19?
a. 0.9 x 0.9 = 0.81
b. 0.6 x 0.2 = 0.18
c. 0.5 x 0.2 = 0.10
d. 0.05 x 0.02 = 0.010
18. Sue bought 2.5 meters of fabric
that cost $2.45 per meter. What
was her total cost?
a. $2.45
b. $6.13
c. $16.13
d. $61.25