9999.123+999.123(简便)
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/19 18:26:47
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9999.123+999.123(简便)
9999.123+999.123(简便)
9999.123+999.123(简便)
9999.123+999.123=
(10000-1+0.123)+(1000-1+0.123)
=10000+1000-1-1+0.123+0.123
=10998.246
9999.123+999.123
=10000-0.877+1000-0.877
=11000-(2*0.877)
=11000-1.754
=10998.246
9999.123+999.123
=9999+999+2×0.123
=(10000-1)+(1000-1)+0.246
=10000+1000-1-1+0.246
=11000-2+0.246
=10998+0.246
=10998.246
9999.123+999.123
=(10000-1+0.123)+(1000-1+0.123)
=11000-2+0.246
=10998.246
将9999.123看做10000.123-1
将999.123看作1000.123-1
9999.123+999.123=10000.123+1000.123-2=11000.246-2=10998.246
9999.123+999.123(简便)
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