Addition
subtraction
fractions addition
simplify fraction
missing factors
100

123+245

368

100

7-2

5

100

1/4 + 2/4

3/4

100

6/12

1/2

100

12

6 x 2

4x3

200

7434+2352

9786

200

70-50

20

200

1/6 +3/6

4/6 or 2/3

200

14/20

7/10

200

16

8x2

4x4

300

786+299

1085

300

500-256

244

300

1/2 + 1/4

3/4

300

12/24

1/2

300

48

6 x 8

2 x 24

4 x 12 

3 x 16

400

58367+480

58847

400

45834-12598

33236

400

3/9 + 1/3

6/9

400

33/121

3/11

400

121

11 x 11

500

10578+3555

14133

500

100,000,000-98654321

1,345,679

500

4/7 + 8/28

6/7

500
132/144

11/12

500

144

12 x 12

24 x 6

2 x 72 

3 x 48

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