作业帮10.2*5.5-2*0.55怎样简算
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/15 18:52:19
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10.2*5.5-2*0.55怎样简算
10.2*5.5-2*0.55怎样简算
10.2*5.5-2*0.55怎样简算
10.2×5.5-2×0.55
=10.2×10×0.55-2×0.55
=102×0.55-2×0.55
=（102-2）×0.55
=100×0.55
=55 ； 或者你也可以
10.2×5.5-2×0.55
=10.2×5.5-2×0.1×5.5
=10.2×5.5-0.2×5.5
=（10.2-0.2）×5.5
=10×5.5
=55 .两种方法都可以,凭你喜欢了.我把详细过程都写出来了,你应该可以自己理解到.
像这类问题最重要的就是抓住两个乘式的相近处,想办法把“相近”化为“相同”.以后像这些题目还是应该自己多思考.
10.2*5.5-2*0.55
=10.2*5.5-0.2*5.5
=（10.2-0.2）*5.5
=10*5.5
=55
=(10+0.2)*(5.5)-2*(0.5+.05)
=10*5.5+0.2*(5+0.5)-2*(5+0.5)*0.1
=10*5.5+0.2*(5+0.5)-0.2*(5+0.5)
=10*5.5
=55
希望给最佳啊
102*0.55-2*0.55
100*0.55
55
10.2*5.5-2*0.55
=102*0.55-2*0.55
=（102+2）*0.55
=100*0.55
=55