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:
34.6 x 9 = 3114
311.4
19.1 x 8.5 = ?
162.35
Karly's bedroom measures 13.2 feet long by 10.3 feet wide. Use the formula Area = length x width to determine the number of square feet for the floor of Karly's bedroom.
_______ ft2
135.96
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
28.6 x 0.17 = ?
4.862
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
405 x 0.47 = ?
190.35
0.04 x 15.6 = ?
0.624
An astronaut's Apollo space suit weighs 29.8 pounds on the moon. It weighs approximately 6.02 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?
**What is the hidden question?
How much Cindy earns total for walking dogs, and total for babysitting.
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
34,000 x 2.65 = ?
90,100
5.8 x 2.5 x 100 = ?
1,450
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?
56.88 x 140 = 196.88