用简便方法计算 12*(1\2-1\3-1\4) (11\12-5\7)*7\11 10又49\50*50 (2\7+3\8)*5.6
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![用简便方法计算 12*(1\2-1\3-1\4) (11\12-5\7)*7\11 10又49\50*50 (2\7+3\8)*5.6](/uploads/image/z/359273-65-3.jpg?t=%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97+12%2A%EF%BC%881%5C2-1%5C3-1%5C4%EF%BC%89+%EF%BC%8811%5C12-5%5C7%EF%BC%89%2A7%5C11+10%E5%8F%8849%5C50%2A50+%EF%BC%882%5C7%2B3%5C8%EF%BC%89%2A5.6)
用简便方法计算 12*(1\2-1\3-1\4) (11\12-5\7)*7\11 10又49\50*50 (2\7+3\8)*5.6
用简便方法计算 12*(1\2-1\3-1\4) (11\12-5\7)*7\11 10又49\50*50 (2\7+3\8)*5.6
用简便方法计算 12*(1\2-1\3-1\4) (11\12-5\7)*7\11 10又49\50*50 (2\7+3\8)*5.6
12×﹙1/2-1/3-1/4﹚ =12×1/2-12×1/3-12×1/4 =6-4-3 =﹣1,如果是六年级学生,可能你的运算符号中的减号抄错了 ﹙11/12-5/7﹚×7/11 =11/12×7/11-5/7×7/11 =7/12-5/11 =17/132 10又49/50×50 =10×50+49/50×50 =500+49 =549 ﹙2/7+3/8﹚×5.6 =2/7×5.6+3/8×5.6 =1.6+2.1 =3.7
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