Multiply by Multiples of 10
Find the product.
3 × 40
120
Which expression is equal to 180?
A. 2 × 90
B. 3 × 6
C. 20 × 9
D. 18 × 100
Answer: A. 2 × 90
Divide.
320 ÷ 8
40
A rectangle has a length of 40 centimeters and a width of 6 centimeters. What is its area?
240 square centimeters
40 × 6 = 240
Fill in the blanks.
6 × 70 = 6 × ___ × 10
= ___ × 10
= ___
6 × 70 = 6 × 7 × 10
= 42 × 10
= 420
Which expression can be used to find 5 × 80?
A. 5 × 8 × 10
B. 5 × 8
C. 5 × 80 × 10
D. 5 × 10
Answer: A. 5 × 8 × 10
630 ÷ 7
90
A rectangle has a length of 30 meters and a width of 9 meters. What is its area?
30 x 9 =270
Find the product.
8 × 60
Answer: 480
Which three expressions are equal to 360?
A. 4 × 90
B. 6 × 6 × 10
C. 40 × 9
D. 36 × 100
E. 60 × 6
A C E
Fill in the blanks to solve.
540 ÷ 6 = ___ tens ÷ 6
= ___ tens
= ___
540 ÷ 6 = 54 tens ÷ 6
= 9 tens
= 90
A rectangle has an area of 240 square feet. Its width is 6 feet. What is its length?
240 divided by 6 = 40
A teacher places 30 pencils in each of 7 containers. How many pencils are there altogether?
7 x 30 =210
Is the equation true or false? Explain.
9 × 50 = 45 × 10
True. Both expressions equal 450.
A teacher divides 720 pencils equally among 8 classes. How many pencils does each class receive?
90 because 720 divided by 8 is 90
A garden has an area of 420 square meters. Its width is 7 meters. What is its length?
420 divided by 7 = 60
Find the missing number.
5 × ___ = 350
70
Which expression is not equal to 560?
A. 7 × 80
B. 7 × 8 × 10
C. 70 × 8
D. 56 × 100
D
Find the missing dividend (whole).
___ ÷ 9 = 70
630
Rectangle A has a length of 80 centimeters and a width of 4 centimeters. Rectangle B has the same area but has a width of 8 centimeters. What is the length of Rectangle B?
Answer: 40 centimeters
Rectangle A: 80 × 4 = 320 square centimeters
Rectangle B: 320 ÷ 8 = 40 centimeters