Question

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50-(4×3)×13=?
1245-(4×12)×22=?
{[1224:(3×4)]+88}:4=?
(100×3):(3×10)+20=?

Answer 1

○ 50-(4*3)*13 =

= 50-12*13 =

= 50-156 =

= -106

○ 1245-(4*12)*22 =

= 1245-48*22 =

= 1245-1056 =

= 189

○ {[1224:(3*4)]+88}:4 =

= [(1224:12)+88]:4 =

= (102+88):4 =

= 190:4 =

= 47,5

○ (100*3):(3*10)+20 =

= 300:30 + 20 =

= 10+20 =

= 30