Estimate
Estimate the product.
1.56 x 4.97 =
2 x 5 = 10
Solve.
3.6 x 102
360
2.4 x 0.3 =
0.72
Gas costs $3.67 at the Speedway. Kelly put 6 gallons in her tank. How much did Kelly spend on gas?
$22.02
To find an approximate value of a calculation is to ___
Estimate the product.
5.68 x 2.04 =
6 x 2 = 12
Solve.
7.2 x 104
72,000
6 x 0.4 =
2.4
A teacher bought 18 rulers that cost $0.85 each. How much money did she spend on rulers.?
$15.30
When multiplying by a power of 10, the ____ tells us the number of places the digit shifts to the left.
Estimate the product.
6.39 x 2.89 =
6 x 3 = 18
Solve.
1.2 x 105
120,000
A pound of beef costs $0.60 per pound. Jason buys 8 pounds of beef. How much did he spend?
$4.80
Austin put 8 gallons of gas in his 15 gallon tank. Premium gas cost $4.05 a gallon. How much did Austin spend on premium gas?
$32.40
A(n) ____ gives two numbers between which acceptable values fall.
Range
Bryce is buying 2.8 kilograms of apples. The apples cost $1.79 per kilogram. About how much will the apples cost?
3 x 2 = $6.00
4,700
Rin needs 0.3 cup of flour per serving to make bread. Rin wants to make 4 servings. How many cups of flour does he need?
1.2 cup of flour
Meg ran 0.6 miles per day for 4 weeks. How many miles did she run in all?
16.8 miles
A factor x a factor = _____
Product
Write an expression that could be used to find the range of reasonable estimates for the product:
10.25 x 5.89
10 x 5= 50
11 x 6= 66
Juan walked 4,700 meters yesterday. Mary walked 9.3 x 102 on the same day. Who walked further, Mary or Juan?
5 x 1.5 = ______
7.5
Kara has a bag of apples. Each apple weighs about 0.4 pounds. There are 17 apples in her bag. What is the total weight of apples?
6.8 pounds
What are the two numbers in a multiplication equation or expression called?
Factors