Estimating & Properties
Estimate and solve: 7.8 x 9
72
Solve: 0.7 x 12
8.4
0.4 x 0.9
0.36
8.7 x 100
870
Which property states that the order of the factors does not change the product?
The commutative property of multiplication
Solve: 0.6 x 15
9
27.1 x 0.8
21.68
43.780 x 103
43,780
Estimate and solve: 69.89 x 7
490
0.812 x 5
4.06
3.4 x 8.2
27.88
44.07 x 101
440.7
Which property is shown here:
10 x 11.50 x 10 = (10 x 10) x 11.50
The Associative Property of Multiplication
Laura grew 0.5 inches every year for 11 years. How many inches did she grow in total?
5.5 inches
There are 1.6 ounces of gummy bears in each bag. How many ounces of gummy bears are there in 6.5 bags?
10.4 ounces
A hose in a dessert factory pumps out 8.6 liters of chocolate syrup each minute. How many liters of chocolate syrup will the hose pump out in 100 minutes?
860 liters
Use the properties of multiplication to solve the following problem:
20 x 12.25 x 5
(20 x 5) x 12.25
100 x 12.25
= 1,225
Dakota can rake and fill 9.6 bags of leaves each hour. How many bags of leaves will Dakota rake and fill in 11 hours?
105.6 bags
Toby is on a treadmill set to 4.8 miles per hour. How many miles would Toby be able to cover in 10.2 hours?
48.96 miles
Conan bought a package of 102 cookies. Each cookie has 2.65 grams of sugar. How many grams of sugar is in the whole package?
265 grams