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Multiplication
addition
100

3x4

3x4=12

100

3+81=

3+81=84

200

7x6=?

42

200

6+91=

6+91=97

300

8x3

8x3=24

400

9x4

9x4=36

700

9x3x5

9x3x5=135

700

226+455+34

226+455+34=715