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用递等式计算(能简算的要简算).12×45÷232112×115-4÷251324×9+11
问题详情
参考答案
(1)12×45÷23,
=12×45×32,
=35;
(2)2112×115-4÷25,
=2512×115-4×52,
=536-10,
=-93136;
(3)1324×9+1124÷19,
=1324×9+1124×9,
=(1324+1124)×9,
=1×9,
=9;
(4)14÷[(56-34)×115],
=14÷[112×65],
=14÷110,
=14×10,
=2.5;
(5)36×(79+34-56),
=36×79+36×34-36×56,
=28+27-30,
=25;
(6)12×34+34+112×34,
=(12+1+112)×34,
=3×34,
=94.
考点:等式