2.5×2.44的简便运算?
4个回答
2022-09-02
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2.5×2.44
=2.5×(2+0.4+0.04)
=2.5×2+2.5×0.4+2.5×0.04
=5+1+0.1
=6.1
或
2.5×2.44
=2.5×(4×0.61)
=2.5×4×0.61
=10×0.61
=6.1
=2.5×(2+0.4+0.04)
=2.5×2+2.5×0.4+2.5×0.04
=5+1+0.1
=6.1
或
2.5×2.44
=2.5×(4×0.61)
=2.5×4×0.61
=10×0.61
=6.1
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2.5×2.44
=2.5×2+2.5×0.4+2.5×0.04
=5+1+0.1
=6.1
=2.5×2+2.5×0.4+2.5×0.04
=5+1+0.1
=6.1
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2022-09-02
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2.5*2.44
=2.5*(2+0.4+0.04)
=5+1+0.1
=6.1
=2.5*(2+0.4+0.04)
=5+1+0.1
=6.1
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先将2.44拆为2×1.22,再用2.5×2×1.22可得5×1.22=6.1
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