(9 5/8+8 5/9)/(7/8+7/9)
(九又八分之五加八又九分之五)除以(八分之七加九分之七)
请用最简便的方法计算
參考答案:(9 5/8+8 5/9)/(7/8+7/9)
=(9+5/8+8+5/9)/(119/72)
=(17+5/8+5/9)*(72/119)
=17*72/119+5/8*72/119+5/9+72/119
=72/7+45/119+40/119
=72/7+85/119
=72/7+5/7
=77/7
=11
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(9 5/8+8 5/9)/(7/8+7/9)
(九又八分之五加八又九分之五)除以(八分之七加九分之七)
请用最简便的方法计算
參考答案:(9 5/8+8 5/9)/(7/8+7/9)
=(9+5/8+8+5/9)/(119/72)
=(17+5/8+5/9)*(72/119)
=17*72/119+5/8*72/119+5/9+72/119
=72/7+45/119+40/119
=72/7+85/119
=72/7+5/7
=77/7
=11