题目内容
用喜欢的方法计算下面各题.
3.7+3.7×9
8.8×12.5
5.4÷1.25÷8
3.59×0.64+0.36×3.59.
3.7+3.7×9
8.8×12.5
5.4÷1.25÷8
3.59×0.64+0.36×3.59.
分析:(1)根据乘法分配律进行简算;
(2)根据乘法交换律和结合律进行简算;
(3)根据除法的性质进行简算;
(4)根据乘法分配律进行简算.
(2)根据乘法交换律和结合律进行简算;
(3)根据除法的性质进行简算;
(4)根据乘法分配律进行简算.
解答:解:
(1)3.7+3.7×9,
=3.7×(1+9),
=3.7×10,
=37;
(2)8.8×12.5,
=(8×1.1)×12.5,
=(8×12.5)×1.1,
=100×1.1,
=110;
(3)5.4÷1.25÷8,
=5.4÷(1.25×8),
=5.4÷10,
=0.54;
(4)3.59×0.64+0.36×3.59,
=3.59×(0.64+0.36),
=3.59×1,
=3.59.
(1)3.7+3.7×9,
=3.7×(1+9),
=3.7×10,
=37;
(2)8.8×12.5,
=(8×1.1)×12.5,
=(8×12.5)×1.1,
=100×1.1,
=110;
(3)5.4÷1.25÷8,
=5.4÷(1.25×8),
=5.4÷10,
=0.54;
(4)3.59×0.64+0.36×3.59,
=3.59×(0.64+0.36),
=3.59×1,
=3.59.
点评:此题主要考查小数的四则混合运算的运算顺序和应用运算定律进行简便计算.
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