题目内容
脱式计算
1.95+0.65+2.15×1.4
(42.3-1.5+0.06)×0.66.
1.95+0.65+2.15×1.4
(42.3-1.5+0.06)×0.66.
分析:(1)先算乘法,再按照从左向右的顺序进行计算;
(2)小括号里面的按照从左向右的顺序进行计算,最后算乘法.
(2)小括号里面的按照从左向右的顺序进行计算,最后算乘法.
解答:解:
(1)1.95+0.65+2.15×1.4,
=1.95+0.65+3.01,
=2.6+3.01,
=5.61;
(2)(42.3-1.5+0.06)×0.66,
=(40.8+0.06)×0.66,
=40.86×0.66,
=26.9676.
(1)1.95+0.65+2.15×1.4,
=1.95+0.65+3.01,
=2.6+3.01,
=5.61;
(2)(42.3-1.5+0.06)×0.66,
=(40.8+0.06)×0.66,
=40.86×0.66,
=26.9676.
点评:此题主要考查小数的四则混合运算的运算顺序,然后根据运算顺序进行计算.
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