用简便方法计算下面各题:①:6/11x(5/8+7/12)②:14/15X7/8x15③:(3/4+5/8)x32 ④:1/4x2/5X5/6
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①6/11×(5/8+7/12)
=6/11×5/8+6/11×7/12
=15/44+7/22
=15/44+14/44
=29/44
② 14/15×7/8×15(约分)
=49/4
③ (3/4+5/8)×32
=3/4×32+5/8×32
=24+20
=44
④ 1/4×2/5×5/6(约分)
=1/12
⑤ 13/11×3/5-3/5×2/11
=(13/11-2/11)×3/5
=1×3/5
=3/5
希望能帮到你, 祝你学习进步,不理解请追问,理解请及时采纳!(*^__^*)
=6/11×5/8+6/11×7/12
=15/44+7/22
=15/44+14/44
=29/44
② 14/15×7/8×15(约分)
=49/4
③ (3/4+5/8)×32
=3/4×32+5/8×32
=24+20
=44
④ 1/4×2/5×5/6(约分)
=1/12
⑤ 13/11×3/5-3/5×2/11
=(13/11-2/11)×3/5
=1×3/5
=3/5
希望能帮到你, 祝你学习进步,不理解请追问,理解请及时采纳!(*^__^*)
追问
恩。抱歉。② 14/15×7/8×15(约分)
④ 1/4×2/5×5/6(约分)
这两题我不懂。不能脱式计算吗
追答
可以直接约分,得出结果
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