题目内容
用你喜欢的方法计算. 9.66÷3.22÷0.25 |
19.6×10.1 | 27.35×99+27.35 | 0.47×9.9. |
分析:(1)按照从左向右的顺序进行计算;
(2)10.1=10+0.1,然后再根据乘法分配律进行简算;
(3)根据乘法分配律进行简算;
(4)9.9=10-0.1然后再根据乘法分配律进行简算.
(2)10.1=10+0.1,然后再根据乘法分配律进行简算;
(3)根据乘法分配律进行简算;
(4)9.9=10-0.1然后再根据乘法分配律进行简算.
解答:解:
(1)9.66÷3.22÷0.25,
=3÷0.25,
=12;
(2)19.6×10.1,
=19.6×(10+0.1),
=19.6×10+19.6×0.1,
=196+1.96,
=197.96;
(3)27.35×99+27.35,
=27.35×(99+1),
=27.35×100,
=2735;
(4)0.47×9.9,
=0.47×(10-0.1),
=0.47×10-0.47×0.1,
=4.7-0.047,
=4.653.
(1)9.66÷3.22÷0.25,
=3÷0.25,
=12;
(2)19.6×10.1,
=19.6×(10+0.1),
=19.6×10+19.6×0.1,
=196+1.96,
=197.96;
(3)27.35×99+27.35,
=27.35×(99+1),
=27.35×100,
=2735;
(4)0.47×9.9,
=0.47×(10-0.1),
=0.47×10-0.47×0.1,
=4.7-0.047,
=4.653.
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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