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7/6×9/4+7/4×9/1用简便计算怎么算

解:根据提取公因式的简便方法, 原式=4/7x6/9+4/7x1/9 =4/7x(6/9+1/9) =4/7x7/9 =4/9

6/7×4/9+4/7×1/9 =(4×6)/(7×9)+(4×1)/(7×9) =(4×6+4×1)/(7×9) =(4×7)/(7×9) =4/9

解:根据提取公因式的简便方法, 原式=4/7x6/9+4/7x1/9 =4/7x(6/9+1/9) =4/7x7/9 =4/9

用简便方法计算 7/9×12+6×4/9 =7/9×12+12×2/9 =(7/9+2/9)×12 =1×12 =12

题目不完整

7/9-(4/9+1/18) =7/9-4/9-1/18 =1/3-1/18 =6/18-1/18 =5/18

=3.9×(2.6+7.4) =3.9×10 =39

7/9-(1/6+4/9) =7/9-4/9-1/6 =1/3-1/6 =1/6

1# 2/3(5/7+2/7) =2/3 2# 3/4*1/9+1/4*1/9 =(3/4+1/4)*1/9 =1/9 3# 5-(6/7*14/3+3/16) =5-4-3/16 =13/16

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