计算,能简算的要简算.0.34×0.5×27.8×6.9+2.2×6.90.4÷(0.12-0.08)×1.27102×0.45.
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解决时间 2021-01-04 17:59
- 提问者网友:不爱我么
- 2021-01-04 00:30
计算,能简算的要简算. 0.34×0.5×27.8×6.9+2.2×6.90.4÷(0.12-0.08)×1.27102×0.45.
最佳答案
- 五星知识达人网友:雾月
- 2021-01-04 01:17
解:
(1)0.34×0.5×2,
=0.34×(0.5×2),
=0.34×1,
=0.34;
(2)7.8×6.9+2.2×6.9,
=(7.8+2.2)×6.9,
=10×6.9,
=69;
(3)0.4÷(0.12-0.08)×1.27,
=0.4÷0.04×1.27,
=10×1.27,
=12.7;
(4)102×0.45,
=(100+2)×0.45,
=100×0.45+2×0.45,
=45+0.9,
=45.9.解析分析:(1)根据乘法结合律进行简算;(2)根据乘法分配律进行简算;(3)先算小括号里面的减法,再算除法,最后算乘法;(4)根据乘法分配律进行简算.点评:四则运算,先弄清运算顺序,然后再进一步计算即可,能简算的要简算.
(1)0.34×0.5×2,
=0.34×(0.5×2),
=0.34×1,
=0.34;
(2)7.8×6.9+2.2×6.9,
=(7.8+2.2)×6.9,
=10×6.9,
=69;
(3)0.4÷(0.12-0.08)×1.27,
=0.4÷0.04×1.27,
=10×1.27,
=12.7;
(4)102×0.45,
=(100+2)×0.45,
=100×0.45+2×0.45,
=45+0.9,
=45.9.解析分析:(1)根据乘法结合律进行简算;(2)根据乘法分配律进行简算;(3)先算小括号里面的减法,再算除法,最后算乘法;(4)根据乘法分配律进行简算.点评:四则运算,先弄清运算顺序,然后再进一步计算即可,能简算的要简算.
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- 1楼网友:封刀令
- 2021-01-04 02:56
我也是这个答案
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