These are numbers that are easy to multiply mentally.
C_______________ N_____________
Compatible Numbers
100
Find the prime factorization of 36.
2x2x3x3
100
Find this product mentally. 345 x 100
34,500
100
Draw an area model to solve.
4 x 67
(4x60) + (4x7)
240 + 28 = 268
100
Jess bought 17 dolls. Each doll cost $43. How much money did Jess spend altogether? Show your work.
17 x 43 = 731
200
The answer to a multiplication problem.
P_______________
Product
200
Draw a factor tree to find the prime factorization of 42.
2x3x7
200
Use mental math to solve.
200 x 40
8,000
200
Use the distributive property to solve. Show your work.
7 x 28
7 x (20 + 8)
(7 x 20) + (7 x 8)
140 + 56 = 196
200
Collin bought 9 flats of strawberries. Each flat contains 24 strawberries. How many strawberries did he buy in all? Show your work.
9 x 24 = 216
300
In a power, this number represents how many times the base is repeated as a factor.
E_____________
Exponent
300
Find the prime factorization of 100. Write it as an exponent.
2x2x5x5
300
Round one factor. Estimate the product.
12 x 793
10 x 793 = 7,930
Did anyone do it differently?
300
Use the distributive property to solve. Show your work.
9 x 44
9 x (40 + 4)
(9 x 40) + (9 x 4)
360 + 36 = 396
300
Samuel rents out apartments for $348 a month. In January he rented out 12 apartments. Estimate how much money he made in January. *Hint - Round one factor.
$348 x 10 = $3,480. Did anyone estimate differently?
400
This property states that you can multiply each addend of a number with a factor, and then add the products back together.
Example: 7x34 is the same thing as (7x30)+(7x4)
The Distributive Property
400
Which prime factor do the numbers 25 and 65 have in common? *Hint - Make a factor tree for each number.
5
400
Round these numbers to make compatible numbers. Estimate the product.
321 x 42
300 x 40 = 12,000 Did anyone round differently?
400
Draw an area model to solve.
5 x 69
(5x60) + (5x9)
300 + 45 = 345
400
Brenda can read 98 words in one minute. How many words would Brenda read if she read for exactly 23 minutes? Show your work.
98 x 23 = 2,254
500
This is a way of showing a composite number as the product of all its prime factors.
For example: 20 = 2x2x5
Prime Factorization
500
What prime factor do the numbers 63 and 28 have in common? *Hint - Make a factor tree for each number.
7
500
Make compatible numbers. Find the estimate mentally.
567 x 423
600 x 400 = 240,000
500
Use the distributive property to solve. Show your work.
3 x 97
3 x (90 + 7)
(3 x 90) + (3 x 7)
270 + 21 = 291
500
Patsy is saving money to buy a new scooter. She saves $2 the first week. She saves $4 the second week. She saves $8 the third week. How much money will she save in 5 weeks TOTAL? *Hint - Make a table