Show:
Mental Math
Round'em Up
Addition
Subtraction
Subtraction 2.0
100

5,342+1,999

7,341

100

1,440-933

1,400-900=500

100

148,382+9,243

157,625

100

4,978-2,766

2,212

100

560-17

543

200

8,999-3,876

5,123

200

995,275+4,921

995,000+5,000=1,000,000

200

215+8,823

9,038

200

41,542-32,411

9,131

200

203,056-5,213

197,843

300

1,089-961

128

300

8,352-3,421

8,400-3,400=5,000

300

32,834+17,384

50,218

300

735,184-255,863

479,321

300

70,000-25,228

44,772

400

22,283-14,162

8,121

400

4,981+6,193

5,000+6,000=11,000

5,000+6,200=11,200

400

142,968+44,456

187,424

400

44,558-22,613

21,945

400

40,700-23,984

16,716

500

4,153+2,988

7,141

500

3,825+1,297+4,175

4,000+1,000+4,000=9,000

500

67,435+2,409

69,844

500

76,237-4,657

71,580

500

67,407-38,227

29,180