题目内容

6.42×1.01-6.4280.7×8.7+8.07×13数学公式×153-0.6×53
23.19+2.4+2.91+14.62.6×99+2.624×(数学公式+数学公式
数学公式数学公式数学公式

解:(1)6.42×1.01-6.42,
=6.42×(1.01-1),
=6.42×0.01,
=0.0642;

(2)80.7×8.7+8.07×13,
=80.7×8.7+80.7×1.3,
=80.7×(8.7+1.3),
=80.7×10,
=807;

(3)×153-0.6×53,
=0.6×(153-53),
=0.6×100,
=60;

(4)23.19+2.4+2.91+14.6,
=(23.19+2.91)+(2.4+14.6),
=26.1+17,
=43.1;

(5)2.6×99+2.6,
=2.6×(99+1),
=2.6×100,
=260;

(6)24×(+),
=24×24×
=9+20,
=29;

(7)()×8
=88
=5+(),
=5+1,
=6;

(8)[×()],
=[],
=
=3,
=

(9),,
=[-()],
=[],
=
=
分析:按照小数、分数四则混合运算的运算顺序和小数、分数四则运算的计算法则进行计算,能用简便方法的用简便方法计算.
点评:此题主要考查小数、分数四则混合运算的计算,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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