1. ... x 3 = 144÷12
2. ...3 = 35 - 30
3... 10 = 8 x 4
4. 30 400 ÷ ...= 152 x 20
5.7600 / 10 = 19 x ...
6.47 ÷... =156 - 25
7.274 + 202 = 28 x ...
8.45 - 334 = ...18
