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電子課本網(wǎng) › 第31頁

第31頁

信息發(fā)布者：

4.2
0.64
0.7
5.2
490
6
0.3
37
8
0.06
0
64
=0.144
≈0.85
=0.0108
=0.25
驗算：
=6.57×(99+1)
=6.57×100
=657
=(3.9+6.1)+(0.56+0.44)
=10+1
=11
=1.25×8×0.4×2.5
=(1.25×8)×(0.4×2.5)
=10×1
=10
=3.75×0.5+6.25×0.5
=(3.75+6.25)×0.5
=10×0.5
=5
=7.8×(10-0.1)
=7.8×10-7.8×0.1
=78-0.78
=77.22
=0.81÷[0.9×0.6]
=0.81÷0.9÷0.6
=0.9÷0.6
=1.5
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