Powers of 10
2.49 x 1,000
2,490
Estimate by rounding to the nearest whole number:
3.56 x 11.2
44
Place the decimal:
4.6 x 9 = 414
41.4
1.9 x 8.5 = ?
16.15
Karly's bedroom measures 13.2 feet long by 8.3 feet wide. Use the formula Area = length x width to determine the number of square feet for the floor of Karly's bedroom.
_______ ft2
109.56
59.1 x 1,000
59,100
Estimate by rounding to the nearest whole number:
12.3 x 0.90
12
0.46 x 3 = ?
1.38
2.8 x 3.12 = ?
8.736
Joy drinks 4 bottles of water per day. Each bottle contains 16.5 fluid ounces. How many fluid ounces of water does she drink per day?
_____ fluid ounces
66
0.76 x 103
760
Estimate by rounding to the largest value:
12.4 x 9.09
90
40 x 0.4 = ?
16
0.4 x 1.6 = ?
0.64
An astronaut's Apollo space suit weighs 29.8 pounds on the moon. It weighs approximately 6.2 times as much on Earth. About how much does an Apollo space suit weigh on Earth?
About 180 pounds
.03 x 102
3
Estimate by rounding to the largest value:
21.6 x 1.98
40
88 x 1.8=?
158.4
8.3 x 10.7
88.81
Cindy earns 18.96 per day walking dogs. She walks the dogs 3 times per week. She also earns $20.00 per hour babysitting on the weekends. If she babysits for 7 hours this weekend, how much money will Cindy have earned this week in all?
$196.88
4.6 x 104
46,000
Estimate by using compatible numbers:
72.45 x 8.92
Acceptable Answers:
70 x 10 = 700
75 x 10 = 750
31 x 2.65 = ?
82.15
5.8 x 2.5 x 100 = ?
1,450
Mike earns 16.96 per day walking dogs. He walks the dogs 4 times per week. He also earns $20.00 per hour helping his uncle on the weekends. If he helps for 5 hours this weekend, how much money will Mike have earned this week in all?
$167.84