6.37*2.8+63.8*0.72怎样简便?
解题思路:不能进行简便兆搏誉运算的按顺序计算,简银胡便运算核心是运用加法和乘法各种定律进行计算,计算出整数部分方便后续计算的过程
解族段题过程:
6.37×2.8+63.8×0.72
=6.37×2.8+63.7×0.72+0.1×0.72
=6.37×(2.8+7.2)+0.072
=63.7+0.072
=63.772
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这个题你可以这样简便计算:
6.3.7×2.8+63.8×0.72
=63.7×0.28+63.8×0.72
=(轿改拆63.8-0.1)×0.28+63.8×0.72
=63.8×1-0.28
=63.52
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感猛雹觉则衡题写错了枝盯帆。应该是
6.37×2.8+63.7×0.72
=6.37×2.8+6.37×7.2
=6.37×(2.8+7.2)
=6.37×10
=63.7
6.37x2.8+(63.7+0.01)局备州x0.72=6.37X2.8+63+7×0.72+0.072=6.37x(2.8+7.2)十0.072=63.7十桐蔽滚宏0.072=63.772