Multiply by multiples of ten
Multiply:
80 x 10
What is 800?
Round each factor to the nearest ten and then multiplying gives an estimated product.
47 x 30
What is 1,500?
Multiply:
55 x 62
What is 3,410?
There are 13 girls on Janelle's soccer team. Uniforms cost $32 each. Write an equation that uses estimation
correctly to show about how much money the team spent?
What is 10 x 30 = 300
_________ is the answer to a multiplication problem.
What is product?
What are the factors of 9?
What is 1, 3, 9.
Fill in the blank:
60 x ___ =4,200
What is 70?
Estimate:
49 x 71 =
What is 350?
Multiply:
85 x 31
What is 2,635?
Henry’s yard is 32 feet long and 9 feet wide. His neighbor’s yard is 26 feet long and 6 feet wide.
A. What is the area of Henry’s yard?
B. What is the area of Henry’s neighbor’s yard?
C. What is the difference between the areas of the yards?
What is
A. 288
B. 156
C. 132
The numbers that we multiply to find a product are called __________.
What are factors?
3, 4, 5, 9, 11, 30, 37
Which of the numbers above are prime?
How do you know?
What is 3, 5, 11, and 37.
Multiply: 67 x 30
What is 2,010?
Use compatible numbers to estimate the product.
24 x 30
What is 750?
Multiply:
34 x 15
What is 510?
Mary’s dog weighs 21 pounds. How many ounces does the dog weigh?
Remember, there are 16 ounces in a pound.
What is 336 ounces?
Counting by a number is called _________ for example, 8, 16, 24, 32
What are multiples?
What are the multiples of 27?
What is 27, 54, 81.
Which of the following could be used to help find the product of 24 × 20?
A. 24 + 30
B. 20 × 20 × 4 × 20
C. 20 + 20 + 4 + 20
D. 20 × 20 + 4 × 20
What is D?
Use rounding to estimate your product.
91 x 27
What is 2700?
Multiply:
98 x 22
What is 2,156?
A tour bus driver's route is 14 miles.
If the driver took 5 tours last week and 14 tours this week, what is the total number of miles the driver will drive?
What is 266?
__________ is when we find a product that is close to the exact answer.
What is estimate?
What are the factors of 27?
What are, 1, 3, 9, 27.
Multiply: 46 x 20
What is 920?
Estimate:
16 x 21
What is 400?
Multiply:
72 x 61
What is 4,392?
The school bought 61 boxes of Valentine cards. The cards cost $10 each. How much money did the school spend?
What is $610?
The hardware store has 5 bins of nails. Each bin has 36 nails.
George broke 36 into 30 + 6 and wrote (30 × 5) + (6 × 5) to find the number of nails in the bins.
A. Which property of operations did he use?
B. Solve the problem.
What is the distributive property?
What is 180?
What are the next 5 multiples of 7 after 40?
What are 42, 49, 56, 63, 70.