Question

30*20-7*8 3000-7*40 40*50-138 70*30-9*50 (235+65)*3-645 (2600+1400):200-1350

Answer 1

1) 544
2) 2720
3) 1862
4) 1650
5) 255
6)-1330

Answer 2

30*20-7*8=544
3000-7*40=2720
40*50-138=1862
70*30-9*50(235+65)*3-645=403545
(2600+1400):200-1350=1330