Răspuns :
117:9×8=13×8=104
77:7×4=11×4=44
104-44=60
160:8×7=20×7=140
100:5×4=20×4=80
140-80=60
40:4×3=10×3=30
30:3×2=10×2=20
30-20=10
77:7×4=11×4=44
104-44=60
160:8×7=20×7=140
100:5×4=20×4=80
140-80=60
40:4×3=10×3=30
30:3×2=10×2=20
30-20=10
8/9=117:9x8=104
4/7=77:7x4=44
104-44=60
7/8=160:8x7=140
4/5=100:5x4=80
140-80=60
3/4=40:4x3=30
2/3=30:3x2=20
30-20=10
4/7=77:7x4=44
104-44=60
7/8=160:8x7=140
4/5=100:5x4=80
140-80=60
3/4=40:4x3=30
2/3=30:3x2=20
30-20=10