Recursive equation: 1-1 / 6 + 1 / 56 + 1 / 72 + 1 / 90

Recursive equation: 1-1 / 6 + 1 / 56 + 1 / 72 + 1 / 90

1-1/6+1/56+1/72+1/90
=1-1/2+1/3+1/7-1/8+1/8-1/9+1/9-1/10
=1-1/2+1/3+1/7-1/10
=31/21-3/5
=(155-63)/105
=92/105

Simple calculation; (96 × 75 × 56) / (32 × 25 × 14)

（96×75×56)÷(32×25×14)
=（96÷32）×（75÷25）×（56÷14）
=3×3×4
=36
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Simple operation of 23.3 * (2-0.75) + 56 * 0.25 + (1 + 0.25) * 28.7

=23.3*1.25+56*0.25+1.25*28.7
=（23.3+28.7）*0.25*5+56*0.25
=52*5*0.25+56*0.25
=13*5*4*0.25+14*4*0.25
=65+14
=79

Calculation: 56.8 × 35.7 + 56.8 × 28.5 + 64.2 × 43.2=______ ．

8 × 35.7 + 56.8 × 28.5 + 64.2 × 43.2, = 56.8 × (35.7 + 28.5) + 64.2 × 43.2, = 56.8 × 64.2 + 64.2 × 43.2, = (56.8 + 43.2) × 64.2, = 100 × 64.2, = 6420