0.027+9.9×0.27要简便计算用递等式
来源:学生作业学帮网 编辑:学帮网 时间:2024/06/06 01:57:39
0.027+9.9×0.27要简便计算用递等式
0.027+9.9×0.27
=0.27x0.1+0.27x9.9
=0.27x(0.1+9.9)
=0.27x10
=2.7
0.027+9.9×0.27
=0.027+(10-0.1)x0.27
=0.027+10x0.27-0.1x0.27
=0.027+2.7-0.027
=2.7
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来源:学生作业学帮网 编辑:学帮网 时间:2024/06/06 01:57:39
0.027+9.9×0.27要简便计算用递等式
0.027+9.9×0.27
=0.27x0.1+0.27x9.9
=0.27x(0.1+9.9)
=0.27x10
=2.7
0.027+9.9×0.27
=0.027+(10-0.1)x0.27
=0.027+10x0.27-0.1x0.27
=0.027+2.7-0.027
=2.7