6.9×3.14-5.6×1.3的简便运算怎么算?
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6.9x3.14-5.6x1.3
=(1.3x3+3)x3.14-5.6x1.3
=1.3x3x3.14+3x3.14-5.6x1.3
=1.3x9.42-5.6x1.3+9.42
=1.3x(9.42-5.6)+9.42
=1.3x3.82+9.42
=(1+0.3)x3.82+9.42
=3.82+1.146+9.42
=4.966+9.42
=14.386
=(1.3x3+3)x3.14-5.6x1.3
=1.3x3x3.14+3x3.14-5.6x1.3
=1.3x9.42-5.6x1.3+9.42
=1.3x(9.42-5.6)+9.42
=1.3x3.82+9.42
=(1+0.3)x3.82+9.42
=3.82+1.146+9.42
=4.966+9.42
=14.386
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6.9x3.14-5.6x1.3
=(1.3x3+3)x3.14-5.6x1.3
=1.3x3x3.14+3x3.14-5.6x1.3
=1.3x9.42-5.6x1.3+9.42
=1.3x(9.42-5.6)+9.42
=1.3x3.82+9.42
=(1+0.3)x3.82+9.42
=3.82+1.146+9.42
=4.966+9.42
=14.386
=(1.3x3+3)x3.14-5.6x1.3
=1.3x3x3.14+3x3.14-5.6x1.3
=1.3x9.42-5.6x1.3+9.42
=1.3x(9.42-5.6)+9.42
=1.3x3.82+9.42
=(1+0.3)x3.82+9.42
=3.82+1.146+9.42
=4.966+9.42
=14.386
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=3×1.3×3.14-1.3×5.6=(3×3.14-5.6)×1.3=4.966
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6.9×3.14-5.6×1.3的简便运算怎么算?
=21.666-7.28
=14.386
望采纳 谢谢~~
=21.666-7.28
=14.386
望采纳 谢谢~~
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6.9×3.14-5.6×1.3
=3×1.3×3.14-1.3×5.6
=(3×3.14-5.6)×1.3
=4.966
=3×1.3×3.14-1.3×5.6
=(3×3.14-5.6)×1.3
=4.966
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