Add/Subtract Multi-Digits

Estimate the Sum

100

Round to the nearest ten: 47 + 32

50+30=80

200

Round to the nearest hundred: 263 + 418

300+400=700

300

Round to the nearest thousand: 2,476 + 3,218

2,000+3,000=5,000

400

Round each number to the nearest hundred: 5,649 + 2,351

5,600+2,400=8,000

500

Round each number to the nearest ten: 14,682 + 27,451

14,680+27,460=42,140

Estimate the Difference

100

Round to the nearest ten: 86 - 41

90-40=50

200

Round to the nearest hundred: 742 - 318

700-300=400

300

Round to the nearest thousand: 6,681 - 2,217

7,000-2,000=5,000

400

Round each number to the nearest hundred: 9,052 - 3,678

9,100-3,700=5.400

500

Round each number to the nearest ten: 42,615 - 18,749

42,620-18,750=23,870

Add 'em up

100

34+28

62

200

267+458

725

300

1,846+2,975

4,821

400

6,738+14,596  

21,334

500

28,475+36,829

65,304

Subtract Away

100

73−48

25

200

624 - 287

337

300

3,502−1,768

1,734

400

8,004−3,579

4,425

500

50,000−27,846

22,154

Fast Facts

100

8 + 7

15

200

16 - 9

7

300

____ + 6 = 14

8

400

Complete the fact family using 5, 8, and 13. Write TWO addition and two subtraction equations.

5+8=13

8+5=13

13-8=5

13-5=8

500

Complete the fact family using 7, 9, and 16. Write two addition and two subtraction equations

7+9=16

9+7=16

16-7=9

16-9=7