4th Grade Math Review

Vocabulary

100

What does it mean to find an answer that is close to the exact amount?

Estimate

200

A number that is multiplied by another number to find a product.

Factor

300

Numbers that are easy to compute mentally

Compatible Numbers

400

A method of multiplying in which the ones, tens, hundreds, and so on are multiplied separately and then the products are added together.

Partial Products

500

What is the answer to a multiplication problem?

Product

2-Digit by 1-Digit

100

23 x 5 =

115

200

82 x 9 = 

738

300

63 x 5

315

400

74 x 6

444

500

46 x 3

138

2-Digit by 2-Digit

100

19 x 54

1,026

200

25 x 76

1,900

300

13 x 54

702

400

63 x 42

2,646

500

65 x 64

4,160

Multiply by Tens

100

40 x 70

2,800

200

11 x 60

660

300

12 x 90

1,080

400

17 x 30

510

500

16 x 60

960

Potpourri

100

Tamika had a piece of ribbon that was 2 feet and 9 inches long. How many total inches of ribbon does Tamika have?

Tamika has 33 inches of ribbon.

200

65,489 - 51,156

14,333

300

Estimate 51 x 36

2,000

400

Estimate 23 x 42

800 or 1,000

500

Name the partial products for 34 x 57.

1,500

210

200

28