能简算的要简算 列式计算4/5÷[5/8×(1-1/5)] 86×4/85 = 9/17×1/7+5/17÷72/5÷(3/4+2/5)

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能简算的要简算列式计算4/5÷[5/8×(1-1/5)]86×4/85=9/17×1/7+5/17÷72/5÷(3/4+2/5)能简算的要简算列式计算4/5÷[5/8×(1-1/5)]86×4/85=

能简算的要简算 列式计算4/5÷[5/8×(1-1/5)] 86×4/85 = 9/17×1/7+5/17÷72/5÷(3/4+2/5)
能简算的要简算 列式计算
4/5÷[5/8×(1-1/5)] 86×4/85 = 9/17×1/7+5/17÷7
2/5÷(3/4+2/5)

能简算的要简算 列式计算4/5÷[5/8×(1-1/5)] 86×4/85 = 9/17×1/7+5/17÷72/5÷(3/4+2/5)
4/5÷[5/8×(1-1/5)]
=4/5÷【5/8 ×4/5】
=4/5÷1/2
=8/5
86×4/85 =
=(85+1)×4/85
=4+4/85
=4又4/85

9/17×1/7+5/17÷7
=9/17×1/7 +5/17×1/7
=(9/17 + 5/17)×1/7
=14/17×1/7
=2/17
2/5÷(3/4+2/5)
=2/5÷23/20
=2/5×20/23
=8/23