计算:56×(1/8+6/7)=?1/3×【1/2×(1/4-1/6)】=?

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计算:56×(1/8+6/7)=?1/3×【1/2×(1/4-1/6)】=?
计算:56×(1/8+6/7)=?1/3×【1/2×(1/4-1/6)】=?

计算:56×(1/8+6/7)=?1/3×【1/2×(1/4-1/6)】=?

56*1/8+56*6/7=7+6*8=55
1/6*(1/4-1/6)=1/72

56×(1/8+6/7)
=7+48
=55
1/3×【1/2×(1/4-1/6)】
=1/6*(1/4-1/6)
=1/24-1/36
=3/72-2/72
=1/72

56×(1/8+6/7)=7+48=55
1/3×【1/2×(1/4-1/6)】=(1/6)(1/4-1/6)=1/24-1/36=1/72