Show:
Mental Math
Fluency
Balancing
Add
Subtraction
100

774 + 100

884

100

20-10

10

100

16+  ____ = 10+10

4

100

79+121

200

100

890-190

700

200

524 + 100

624

200

6 + 14

20

200

100 = 20 + ____

80

200

341+218

559

200

723-487

236

300

774 - 100

664

300

20-15

5

300

5-1 = 2+ __

2

300

500+500

1000

300

501-123

378

400

524 - 100

424

400

15 - 9

4

400

34-20=7+___

7

400

257+527

784

400

332-118

214

500

200 - 100

100

500

2 + ---- = 14

12

500

120-89=20+___

11

500

75+25+100+47

247

500

fewer means

subtract