Question

примеры 248*65+31*65-279*64 и 28*51-17*51+11*49

Answer 1

248*65+31*65+279*65=279
1) 248*65=16120
2)31*65=2015
3)279*64=17856
4)16120+2015-17856=279

28*51-17*51+11*49=1100
1)28*51=1428
2)17*51=867
3)11*49=539
4)1428-867+539=1100