用简便方法计算 7.25-3.46-1.58 1.9+207+0.93+1.1 85.82-(14 10
用简便方法计算7.25-3.46-1.581.9+207+0.93+1.185.82-(14.3-8.7)72.8+3.4+27.2+6.637.61-(7.61+1.2...
用简便方法计算
7.25-3.46-1.58
1.9+207+0.93+1.1
85.82-(14.3-8.7)
72.8+3.4+27.2+6.6
37.61-(7.61+1.25)
15.42-6.5.42-3.5 展开
7.25-3.46-1.58
1.9+207+0.93+1.1
85.82-(14.3-8.7)
72.8+3.4+27.2+6.6
37.61-(7.61+1.25)
15.42-6.5.42-3.5 展开
展开全部
7.25-3.46-1.58
=7.25-(3.46+1.58)
=7.25-5.04
=2.21
1.9+207+0.93+1.1
=(1.9+1.1)+207+0.93
=3+207+0.93
=210+0.93
=210.93
85.82-(14.3-8.7)
=(85.82+8.7)-14.3
=94.52-14.3
=80.22
72.8+3.4+27.2+6.6
=(72.8+27.2)+(3.4+6.6)
=100+10
=110
37.61-(7.61+1.25)
=(37.61-7.61)-1.25
=30-1.25
=28.75
15.42-6.5-5.42-3.5
=15.42-6.5-5.42-3.5
=(15.42-5.42)-(6.5+3.5)
=10-10
=0
=7.25-(3.46+1.58)
=7.25-5.04
=2.21
1.9+207+0.93+1.1
=(1.9+1.1)+207+0.93
=3+207+0.93
=210+0.93
=210.93
85.82-(14.3-8.7)
=(85.82+8.7)-14.3
=94.52-14.3
=80.22
72.8+3.4+27.2+6.6
=(72.8+27.2)+(3.4+6.6)
=100+10
=110
37.61-(7.61+1.25)
=(37.61-7.61)-1.25
=30-1.25
=28.75
15.42-6.5-5.42-3.5
=15.42-6.5-5.42-3.5
=(15.42-5.42)-(6.5+3.5)
=10-10
=0
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