Powers of 10
2.88 x 100 =
288
Estimate by rounding each number to its greatest place value and then multiplying:
3.66 x 217 ≈
4 x 200 = 800
0.3 x 0.2 =
0.06
Each metal ball weighs 64.2 grams. How much do 6 metal balls weigh in all?
385.2 grams
0.6 × 3 _____ 1.5
1.8 > 1.5
100,000 x 0.81 =
81,000
Estimate by rounding each number to its greatest place value and then multiplying.
521 x 3.5 ≈
0.03 x 8 =
0.24
Britney placed 20 weights on a scale during science class. If each of the weights weighed 0.54 grams, what did the scale read?
10.8 grams
0.4 × 2.5 ______ 1.2
1 < 1.2
0.09 x 104 =
900
Estimate by rounding each number to its greatest place value and then multiplying.
8.8 x 5 ≈
9 x 5 = 45
4.9 x 1.3 =
6.37
Samantha is baking cookies. Each cookie requires 0.75 cups of flour. If she wants to bake 8 cookies, how many cups of flour will she need in total?
6 cups
0.9 × 1.1 _____ 0.8
0.99 > 0.8
31 x 0.01 =
0.31
Estimate by rounding each factor to the nearest whole number and then multiplying.
0.43 x 7.95 ≈
0 x 8 = 0
393 x 4.5 =
1,768.5
A car travels 0.6 miles per minute. How far will the car travel in 12 minutes?
7.2 miles
1.2 × 0.7 _____ 1.0
0.84 < 1.0
3,896.9 x 0.01 =
38.969
Estimate by rounding each factor to the nearest whole number and then multiplying.
8.80 x 2.29 ≈
9 x 2 = 18
99.8 x 0.51 =
50.898
A water bottle holds 1.25 liters of water. If James buys 4 bottles, how many liters of water does he have in total?
5 liters
1.2 × 0.8 _____ 0.96
0.96 = 0.96