题库搜索>问题求解PS-12271
The value of (9*107)(9*108) is closest to which of the following?
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因为9接近10，所以可把两个9看成10，则原算式约等于1017
默默
3*3+3*4=3*（3+4） 3*3*3*4不等于 3*（3*4）
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2018-04-22 14:03:02
默默回复默默
近似值法
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2018-04-22 14:03:18
xx酱
虽然最后的科学计数应该是8.1×10^16 但是更接近10^17
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2017-03-10 08:55:43
默默回复xx酱
乘法和加法不能混
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2018-04-22 14:01:27
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