6/7×5/9+4/9×6/7(简便计算) 0.8-(2/3+1/12)×8/9 5/6÷(6-5/12-7/12

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6/7×5/9+4/9×6/7(简便计算) 0.8-(2/3+1/12)×8/9 5/6÷(6-5/12-7/12

6/7×5/9+4/9×6/7(简便计算) 0.8-(2/3+1/12)×8/9 5/6÷(6-5/12-7/12
6/7×5/9+4/9×6/7(简便计算) 0.8-(2/3+1/12)×8/9 5/6÷(6-5/12-7/12

6/7×5/9+4/9×6/7(简便计算) 0.8-(2/3+1/12)×8/9 5/6÷(6-5/12-7/12
简便计算
6/7×5/9+4/9×6/7
=6/7x(5/9+4/9)
=6/7x1
=6/7
0.8-(2/3+1/12)×8/9
=4/5-2/3x8/9-1/12x8/9
=4/5-16/27-2/27
=4/5-2/3
=2/15
5/6÷(6-5/12-7/12)
=5/6÷(6-1)
=5/6÷5
=1/6

简便计算
6/7×5/9+4/9×6/7
=6/7x(5/9+4/9)
=6/7x1
=6/7
0.8-(2/3+1/12)×8/9
=4/5-2/3x8/9-1/12x8/9
=4/5-16/27-2/27
=4/5-2/3
=2/15
5/6÷(6-5/12-7/12)
=5/6÷(6-1)
=5/6÷5
=1/6