2.15x3.49+21.5x0.651,怎么简算?
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先根据小数的不变规律,把21.5x0.651变形为2.15x6.51,然后再根据乘法分配律,进行简便计算。
2.15x3.49+21.5x0.651
=2.15x3.49+2.15x6.51
=2.15x(3.49+6.51)
=2.15x10
=21.5
2.15x3.49+21.5x0.651
=2.15x3.49+2.15x6.51
=2.15x(3.49+6.51)
=2.15x10
=21.5
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2.15×3.49+21.5×0.651简算:
2.15×3.49+21.5×0.651
=2.15×10×3.49➗10+21.5×0.651
=21.5×0.349+21.5×0.651
=21.5×(0.349+0.651)
=21.5×1
=21.5
希望能帮到你
2.15×3.49+21.5×0.651
=2.15×10×3.49➗10+21.5×0.651
=21.5×0.349+21.5×0.651
=21.5×(0.349+0.651)
=21.5×1
=21.5
希望能帮到你
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解:2.15×3.49+21.5×0.651
=2.15×3.49+2.15×10×0.651
=2.15×(3.49+6.51)
=2.15×10
=21.5
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2.15x3.49+21.5x0.651
=2.15x(3.49+6.51)
=2.15x10
=21.5
=2.15x(3.49+6.51)
=2.15x10
=21.5
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评论
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你对这个回答的评价是?
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