Grade 4 Math

Big Multiplication

100

15 x 20

300

200

30 x 24

720

300

23 x 17

391

400

43 x 9

387

500

29 x 47

1,363

Big Division

100

4000 ÷ 10

400

200

3,300 ÷ 100

33

300

256 ÷ 8

32

400

225 ÷ 9

25

500

6,024 ÷ 6

1,004

Subtraction

100

321 - 119

202

200

420 - 121

299

300

600 - 399

201

400

524 - 128

396

500

5,000 - 1,259

3,741

Area & Perimeter

100

What is the area of the rectangle with dimensions:

Length = 7 cm

Width = 6 cm

A = length x width

A = 6 x 7

A = 42 sq. cm.

200

What is the perimeter of the rectangle with dimensions:

Width: 6 cm

Length 7 cm

P = (2 x width) + (2 x length)

P = (2 x 6) + (2 x 7)

P = (12) + (14)

P = 26 cm

300

What is the length of the rectangle that has a width of 5 in. and an area of 95 sq. in.?

A = length x width

95 = length x 5

length = 95 ÷ 5

length = 19 in.

400

What is the length of the rectangle that has a width of 5 in. and a perimeter of of 90 in.?

5 + 5 = 10

90-10 = 80

80 ÷ 2 = 40

Answer: 40 in.

500

What is the length of the rectangle that has a width of 8 cm. and a perimeter of of 62 cm.?

8 + 8 = 16

62 - 16 = 46

46 ÷ 2 = 23 cm.

Answer:23 cm.

Fast Facts!

100

Fast Facts...

8 x 1 = 8, so 8 X 10 = ______

80

200

Fast Facts...

7 x 2 = 14, so 7 X 20 = ______

140

300

Fast Facts...

5 x 9 = 45, so 5 X 900 = ______

4,500

400

Fast Facts...

25  ÷ 5 = 5, so 250 ÷ 5 = ______

50

500

Fast Facts...

63 ÷ 9 = 7, so 6,300 ÷ 9 = ______

700