Show:
More than 2
Regroup
Flip Flop
Estimate by Rounding
ADD IT UP
100

2 + 2 + 3 = ?

7

100

15 Tens = ?

150 

100
? = 17 + 5

22

100

Estimate by rounding to the nearest 10. 

78 + 12

90

100

192 + 464

What is 656?

200

20 + 30 + 40 = ?

90

200

32 Tens = ? 

320

200

? = 40 + 32

72

200

Round to the hundred. 

631 + 798

1400

200
387 + 251
What is 638?
300

700 + 120 + 14 = ?

834

300

12 Hundred = ? 

1,200

300

? = 75 + 20

95

300

Estimate by rounding to the nearest hundred.

 305 + 863

1200

300
834 + 486
What is 1320?
400

123 + 526 + 136 = ?

785

400

47 Hundred = ?

4,700

400

? = 403 + 56

459

400

Estimate by rounding to the nearest THOUSAND to find the sum. 

1,699 + 2,034

4000

400
6,345 + 2,956
What is 9301?
500

1,500 + 2,850 + 342 = ?

4,692

500

73 Hundred = ?

7,300

500

? = 837 + 150

987

500

Estimate by rounding to the nearest THOUSAND to find the sum. 

3,978 + 6,209

10,000

500

7,895 + 3,647

What is 11,542?