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291/2*2/3+391/3*3/4+491/4*4/5+591/5*5/6怎样简便计算?
题目详情
291/2*2/3+391/3*3/4+491/4*4/5+591/5*5/6怎样简便计算?
▼优质解答
答案和解析
291/2*2/3+391/3*3/4+491/4*4/5+591/5*5/6
=291/3+391/4+491/5+591/6
=(300-9)/3+(400-9)/4+(500-9)/5+(600-9)/6
=100-3+100-9/4+100-9/5+100-3/2
=400-8.55
=392.45
=291/3+391/4+491/5+591/6
=(300-9)/3+(400-9)/4+(500-9)/5+(600-9)/6
=100-3+100-9/4+100-9/5+100-3/2
=400-8.55
=392.45
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