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 ④:1/4x2/5X5/6⑤:13/11x3/5-3/5X2/11 要脱式计算和简便计算
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![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 ④:1/4x2/5X5/6⑤:13/11x3/5-3/5X2/11 要脱式计算和简便计算](/uploads/image/z/247368-48-8.jpg?t=%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97%E4%B8%8B%E9%9D%A2%E5%90%84%E9%A2%98%EF%BC%9A%E2%91%A0%EF%BC%9A6%2F11x%285%2F8%2B7%2F12%29%E2%91%A1%EF%BC%9A14%2F15X7%2F8x15%E2%91%A2%EF%BC%9A%EF%BC%883%2F4%2B5%2F8%EF%BC%89x32+%E2%91%A3%EF%BC%9A1%2F4x2%2F5X5%2F6%E2%91%A4%EF%BC%9A13%2F11x3%2F5-3%2F5X2%2F11+%E8%A6%81%E8%84%B1%E5%BC%8F%E8%AE%A1%E7%AE%97%E5%92%8C%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97)
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 ④:1/4x2/5X5/6⑤:13/11x3/5-3/5X2/11 要脱式计算和简便计算
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
⑤:13/11x3/5-3/5X2/11 要脱式计算和简便计算
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 ④:1/4x2/5X5/6⑤:13/11x3/5-3/5X2/11 要脱式计算和简便计算
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
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