5\7 ×5\9 +4\9 ÷7\5 1÷(1+5\8 ÷5) (54+9\13 )÷9 求助这3道简便计算!
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![5\7 ×5\9 +4\9 ÷7\5 1÷(1+5\8 ÷5) (54+9\13 )÷9 求助这3道简便计算!](/uploads/image/z/13323614-14-4.jpg?t=5%5C7+%C3%975%5C9+%EF%BC%8B4%5C9+%C3%B77%5C5+1%C3%B7%EF%BC%881%EF%BC%8B5%5C8+%C3%B75%EF%BC%89+%EF%BC%8854%EF%BC%8B9%5C13+%EF%BC%89%C3%B79+%E6%B1%82%E5%8A%A9%E8%BF%993%E9%81%93%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%21)
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5\7 ×5\9 +4\9 ÷7\5 1÷(1+5\8 ÷5) (54+9\13 )÷9 求助这3道简便计算!
5\7 ×5\9 +4\9 ÷7\5 1÷(1+5\8 ÷5) (54+9\13 )÷9 求助这3道简便计算!
5\7 ×5\9 +4\9 ÷7\5 1÷(1+5\8 ÷5) (54+9\13 )÷9 求助这3道简便计算!
5\7 ×5\9 +4\9 ÷7\5
=5\7 ×5\9 +4\9 ×5\7
=5\7 ×(5\9 +4\9)
=5\7
1÷(1+5\8 ÷5)
=1÷(1+5\8 ×1\5)
=1÷(1+1\8)
=1 ×(8\9)
=8\9
(54+9\13 )÷9
= (54+9\13 )× 1\9
=6+1\13
=6又1\13