(80.75÷8.75-7.75)×3.2的简便计算?
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(80.75÷8.75-7.75)×3.2
=(80+3/4)×3.2÷(8+3/4)-(7+3/4)×3.2
=(80×3.2+3/4×3.2)÷(35/4)-7×3.2-3/4×3.2
=(256+2.4)×(4/35)-22.4-3×0.8
=258.4×(4/35)-(22.4+2.4)
=10336/350-24.8
=5168/175-24-4/5
=29+93/175-24-140/175
=5-(140-93)/175
=5-47/175
=4又175分之128
=(80+3/4)×3.2÷(8+3/4)-(7+3/4)×3.2
=(80×3.2+3/4×3.2)÷(35/4)-7×3.2-3/4×3.2
=(256+2.4)×(4/35)-22.4-3×0.8
=258.4×(4/35)-(22.4+2.4)
=10336/350-24.8
=5168/175-24-4/5
=29+93/175-24-140/175
=5-(140-93)/175
=5-47/175
=4又175分之128
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2022-04-13
展开全部
=(80+3/4)×3.2÷(8+3/4)-(7+3/4)×3.2
=(80×3.2+3/4×3.2)÷(35/4)-7×3.2-3/4×3.2
=(256+2.4)×(4/35)-22.4-3×0.8
=258.4×(4/35)-(22.4+2.4)
=10336/350-24.8
=5168/175-24-4/5
=29+93/175-24-140/175
=5-(140-93)/175
=5-47/175
=4又175分之128
=(80×3.2+3/4×3.2)÷(35/4)-7×3.2-3/4×3.2
=(256+2.4)×(4/35)-22.4-3×0.8
=258.4×(4/35)-(22.4+2.4)
=10336/350-24.8
=5168/175-24-4/5
=29+93/175-24-140/175
=5-(140-93)/175
=5-47/175
=4又175分之128
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