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9分之2加(8分之5加9分之7) 脱式什算

9.12+7/9+2.88+2/9 =(9.12+2.88)+(7/9+2/9) =12+1 ...

0.54

望采纳

9分之7×3分之2-9分之2 =14/27-2/9 =14/27-6/27 =8/27 100分...

=1/8x9/7+5/7x1/8 =1/8X(9/7+5/7) =1/8x2 =1/4

脱式(4+9)×1/9=4/ 9+1。

解: (2/9)×(3/8)÷(6/7) =(2/9)×(3/8)×(7/6) =(2×3×7...

1/3+4/9-7/12 =12/36+16/36-21/36 =(12+16-21)/36这一...

如图

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