| Prime Factorization and Exponents | Estimation | Multiplication by 1-digit numbers | Multiplication by 2-digit numbers | Word Problems |
|---|---|---|---|---|
|
2 x 2 x 5
What is the prime factorization of 20?
|
200 x 6 = 1,200
or 200 x 10 = 2,000
Estimate 218 x 6.
|
24 x 7 = 168
24 x 7
|
54 x 41 = 2,214
54 x 41
|
23 x 9 = 207 miles
Melanie runs 23 miles each week. How many miles does she run in 9 weeks?
|
|
2 x 3 x 7
What is the prime factorization of 42?
|
100 x 30 = 3,000
or 130 x 30 = 3,900
Estimate 131 x 29.
|
68 x 2 = 136
68 x 2
|
76 x 15 = 1,140
76 x 15
|
$0.57 x 3 = $1.71
Pencils cost 57 cents each. How much did Yoshi spend if he bought 3 pencils?
|
|
2 x 2 x 2 x 2 = 16
What is the value of 2 to the 4th power?
|
60 x 70 = 4,200
Estimate 61 x 68.
|
52 x 5 = 260
52 x 5
|
41 x 42 = 1,722
41 x 42
|
14 x 8 = 112 ounces
Ben bought 14 cans of cat food. Each can weighs 8 ounces. How many ounces of cat food did she buy?
|
|
5 x 5 x 5 = 125
What is the value of 5 to the 3rd power?
|
60 x 40 = 2,400
Find the product mentally.
60 x 40 |
74 x 8 = 592
74 x 8
|
19 x 84 = 1,596
19 x 84
|
11 x 24 = 264 flowers
Coleen bought 11 flats of flowers. Each flat contains 24 flowers. How many flowers did she buy?
|
|
4 x 4
Write each power as a product of the same factor.
4 to the second power |
73 x 100 = 7,300
Find the product mentally.
73 x 100 |
852 x 9 = 7,668
852 x 9
|
585 x 48 = 28,080
585 x 48
|
278 x 21 = 5,838 miles
A delivery truck travels 278 miles each day. How far does it travel in 21 days?
|
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