7/25×15/18+15/27×13/18的简便计算?
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7/25×15/18+15/27×13/18的简便计算如下:
=(7×3×5)/(5×5×3×6)+(3×5×13)/(3×9×3×6)
=7/(5×6)+(5×13)/(27×6)
=(7×27)/(5×6×27)+(5×13×5)/(5×6×27)
=[(7×27)+(5×13×5)]/(5×6×27)
=(189+65×5)/(5×6×27)
=(189+325)/(5×6×27)
=514/(5×6×27)
=257/405
=(7×3×5)/(5×5×3×6)+(3×5×13)/(3×9×3×6)
=7/(5×6)+(5×13)/(27×6)
=(7×27)/(5×6×27)+(5×13×5)/(5×6×27)
=[(7×27)+(5×13×5)]/(5×6×27)
=(189+65×5)/(5×6×27)
=(189+325)/(5×6×27)
=514/(5×6×27)
=257/405
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2023-05-10
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7/25*15/18+15/27*13/18
=7/25*15/18+15/18*13/25
=15/18*(7/25+13/25)
乘法分配律简便运算
=5/6*20/25
=4/6
=2/3
=7/25*15/18+15/18*13/25
=15/18*(7/25+13/25)
乘法分配律简便运算
=5/6*20/25
=4/6
=2/3
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