854
ա) 4×1/5+4×3/7-4×1/35=84/35
- 4×1/5=4/5
- 4×3/7=12/7
- 4×1/35=4/35
- 4/5+12/7=88/35
- 88/35-4/35=84/35
բ) 3/8×5×5/56-1/7:1/5=5/4
- 3/8×5=15/8
- 1/7:1/5=5/7
- 15/8+5/56=55/28
- 55/28-5/7=5/4
գ) 3/2×5/6+3/2:9/10-3/2×13/18=11/6
- 3/2×5/6=5/4
- 3/2:9/10=5/3
- 3/2×13/18=11/6
- 5/4+5/5=35/12
- 35/12-13/12=11/6
դ) 4/5:5/8-4/5×24/25+1/25:5/4=68/125
- 4/5:5/8=32/25
- 4/5×24/25=96/125
- 1/25:5/4=4/125
- 32/25-95/125=64/125
- 64/125+4/125=68/125