Sixth grade mathematics: fraction mixing, simple operation. Very urgent! It's going to be used tonight! Could you hurry up, please? 1/7×6/13+8/13×1/7=? 2-5/11÷9/22-5/9=? (5/6-3/4)÷5/12+9/5=? Write out the process ~ ~ online waiting, thanks!
1/7×6/13+8/13×1/7=(6/13 + 8/13) X 1/7 = 14/13 x 1/7 = 2/132-5/11÷9/22-5/9= 2 - 5/11 * 22/9 - 5/9 = 2- (5*22)/(9*11) - 5/9= 2 - 5/9( 22/11 + 1) = 2 - 5/9 * 3 = 2- 5/3 = 1/3(5/6-3/4)÷5/12+9/5=?=(5...
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