题目内容
用简便方法计算
46.5×99+46.5 | 7.96+0.49-2.96. |
分析:①46.5×99+46.5运用乘法分配律简算;
②7.96+0.49-2.96.根据加、减法的运算性质简算.
②7.96+0.49-2.96.根据加、减法的运算性质简算.
解答:解:①46.5×99+46.5
=46.5×(99+1)
=46.5×100
=4650;
②7.96+0.49-2.96.
=7.96-2.96+0.49
=5+0.49
=5.49.
=46.5×(99+1)
=46.5×100
=4650;
②7.96+0.49-2.96.
=7.96-2.96+0.49
=5+0.49
=5.49.
点评:完成本题要注意分析式中数据,运用合适的简便方法计算.
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