8.25×75+825×0.25简便计算
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8.25×75+825×0.25
=8.25X75+8.25X100X0.25
=8.25X75+8.25X25
=8.25X(75+25)
=8.25X100
=825
咨询记录 · 回答于2021-11-16
8.25×75+825×0.25简便计算
8.25×75+825×0.25
=8.25X75+8.25X100X0.25
=8.25X75+8.25X25
=8.25X(75+25)
=8.25X100
=825
8.25×75+825×0.25
=8.25X75+8.25X100X0.25
=8.25X75+8.25X25
=8.25X(75+25)
=8.25X100
=825
46×0.63+5.4×6.3简便计算
46×0.63+5.4×6.3简便计算
就是把825写成8.25x100,然后利用加法结合律
46×0.63+5.4×6.3=46x0.63+5.4x0.63x10=46*0.63+54x0.63=(46+54)x0.63=100x0.63=63
1.6x-x=12
1.6x-x=12
不好意思,才看到
怎么解答
怎么解答
1.6x-x=120.6x=12x=12÷0.6x=20
谢谢
谢谢
不用谢!