简便方法计算,3·45x102?0·47x0·5x0·8?0·46x1·9+0·54x1·9=?
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发布时间:2024-10-08 04:42
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热心网友
时间:2024-10-11 15:02
3·45x102
=3.45×(100+2)
=3.45×100+3.45×2
=345+6.9
=351.9
0·47x0·5x0·8
=0.47×0.4
=0.168
0·46x1·9+0·54x1·9
=1.9×(0.46+0.54)
=1.9×1
=1.9
热心网友
时间:2024-10-11 15:10