Powers of 10
10 x 4.5
45
6.22 x 3 = 1866
18.66
1.3 x 0.4
0.52
Jamal buys 33 bolts that cost $0.38 each.
Which equation represents the best estimate for the total cost of all of the bolts?
30 x $0.40 = $12
100 x 4.5
450
1.8 x 1.9 = 342
3.42
0.6 x 0.2
0.12
Rocio poured a square patio outside her back door. Each side measured 8.5 feet.
Which equation represents the perimeter, in feet, of Rocio's patio?
8.5 + 8.5 + 8.5 + 8.5 = 34
or
8.5 x 4 = 34
0.008 x 102
0.8
0.05 x 12.4 = 62
0.62
0.33 x 0.8
0.264
Rocio poured a square patio outside her back door. Each side measured 8.5 feet.
What is the area of the patio?
8.5 x 8.5 = 72.25
103x 3.65
3,650
0.9 x 0.9 = 81
0.81
4.2 x 4.2
17.64
Jade's cat weighs 8.3 pounds. Her dog weighs 5 times as much as her cat.
How much does her dog weigh?
8.3 x 5 = 41.5
100 x 5.12
5.12
3.1 x 6.2 = 1922
19.22
2.6 x1.4
3.64
50.2 × 1/102
0.502