3.9-3.9×0.5简便计算
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3.9-3.9×0.5简便计算
3.9-3.9×0.5简便计算
3.9-3.9×0.5简便计算
3.9×(1-0.5)=1.95
0?
1.95
3.9-3.9×0.5
=3.9×(1-0.5)
=3.9×0.5
=1.95
3.9-3.9x0.5
=3.9x(1-0.5)
=3.9x0.5
=1.95
3.9-3.9×0.5
=3.9(1-0.5)
=3.9*0.5
=1.95
请采纳!
没法简便
收起
3.9-(4-0.1)×0.5
=3.9-4×0.5-0.1×0.5=3.9-2-0.05
=1.85
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