A
Don works 18 hours a week. Which expression shows a good way to use rounding to estimate how many hours Don will work in 52 weeks
20 X 50
Find the product of 21 x 40. Show your work.
840
Margo hiked 12 miles 13 times last month. She hiked 14 miles 12 times this month
- Draw arrays or areas models to find the number of miles Margo hiked during the past two months
324 miles
A florist makes centerpieces. He puts 18 roses in each centerpiece. Which is the best way to use compatible numbers to estimate the number of roses the florist needs for 24 centerpieces? What is the exact number of roses?
a.) 10 x 25 = 250; 360
b.) 20 x 25 = 500; 432
c.) 25 x 30 = 750; 672
d.) 30 x 30 = 900: 784
b.) 20 x 25 = 500; 432
The product of two factors is 2,000. One of the factors is 50. What is the other factors?
a.) 20
b.) 40
c.) 200
d.) 400
b.) 40
Select all the expressions that are equal to 260
a.) 23 x 10
b.) 20 x 10 + 3 x 10
c.) 13 x 20
d.) 1 x 20 + 3 x 20
e.) 10 x 20 + 3 x 20
c.) 13 x 20
d.) 10 x 20 + 3 x 20
Justine's plant shop has 7 shelves. Each shelf holds 18 plants. Suppose she adds 2 more shelves to the shop. Write and solve equations to find the number of plants all of the shelves can hold. Check if your answer is reasonable.
9 x 18 = 162
$3,198
Which of the following uses properties of operations to help find 27 x 14
a.) 20 + 7 + 10 + 4
b.) 20 x 7 x 10 x 4
c.) 27 + 14
d.) (20 + 7) x (10 + 4)
d.) (20 + 7) x (10 + 4)
The biggest painting in an art show is 31 inches long and 28 inches wide. The smallest painting is 14 inches long and 11 inches wide. What is the difference between the areas of the two paintings? Use equations to show your work.
The product of two factors is 8,000. One of the factors is 40. What is the other factors?
a.) 20
b.) 40
c.) 200
d.) 600
c.) 200
Find the product of 14 x 67. Show your work.
938