3.8×3.5+5.5×3.82+3.8简便运算？
1个回答
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3.8×3.5+5.5×3.82+3.8
=3.8x(3.5+2)+5.5x3.82-3.8
=5.5x(3.8+3.82)-3.8
=5.5x7.62-3.8
=5x7.62+0.5x7.62-3.8
=38.1+3.81-3.8
=38.1+0.01
=38.11
=3.8x(3.5+2)+5.5x3.82-3.8
=5.5x(3.8+3.82)-3.8
=5.5x7.62-3.8
=5x7.62+0.5x7.62-3.8
=38.1+3.81-3.8
=38.1+0.01
=38.11
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