题目内容
8.6×10.1=8.6×10+1.
×
×
.(判断对错)分析:在计算8.6×10.1时,根据数字特点,可运用凑整法与乘法分配律分析判断.
解答:解:8.6×10.1,
=8.6×(10+0.1),
=8.6×10+0.1×8.6,
=86+0.86,
=86.86,
故答案为:×.
=8.6×(10+0.1),
=8.6×10+0.1×8.6,
=86+0.86,
=86.86,
故答案为:×.
点评:在利用凑整法计算时,要注意凑整后原数值增加或减少了多少.
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