Mental Strategies for Multiplication and Division
Solve (all must be correct):
20 x 70=
20 x 700=
20 x 7000=
1,400
14,000
140,000
Convert weeks to days:
15 weeks = ____ days
105
65.2 x 100 =
6,520
Find the quotient and remainder: 73/16 =
4R9
Estimate the product:
5.24 × 8
40
Write an equation and solve: 3 times the difference between 9 and 4
3 x (9-4) = 15
5.04 x 8 =
40.32
2.4 ÷ 40 =
0.06
Round the factors to estimate each product.
621 x 29 =
18,000
38 x 45 =
1,710
0.45 x 26
11.7
5.6 ÷ 16 =
0.35
What is the closest estimate to the value of n?
223 ÷ 72 = n
n = 3
A water park sells 168 tickets. Each ticket costs $12. What is the total cost of the tickets sold? Show your work.
$2016
1.21 x 14 =
16.94
Divide (Use decimals instead of remainders):
52.21/23 =
2.27
Round the divisor and whole to estimate the quotient: 1,134 ÷ 63 =
20
An airline ticket to Florida from a certain city costs $249. How much money does the airline collect if 385 tickets are sold?
95,865
A gallon of gas costs $2.73. Walter pays for 24 gallons of gas. He gives the clerk $80.00. How much change should Walter receive after paying for the gas?
$14.48
Mr. Parks spent $96.30 on 3 hats and 6 key chains. If each hat cost $15.50, how much did each key chain cost?
$8.30