Question

简便运算题

7/29×3/8+6/29×7/12+3/29×7/9的简便运算...急...谢谢~！

Answer 1

7/29×3/8+6/29×7/12+3/29×7/9
=7/29*（3/8+6/12+3/9）
=7/29*（3/8+1/2+1/3）
=7/29*（3/8+5/6）
=7/29*（29/24）
=7/24

Answer 2

7/29×3/8+6/29×7/12+3/29×7/9
=7/29×3/8+7/29×6/12+7/29×3/9
=7/29×(3/8+6/12+3/9)
=7/29×(3/8+1/2+1/3)
=7/29×(9/24+12/24+8/24)
=7/29×29/24
=7/24

Answer 3

7/29×3/8+6/29×7/12+3/29×7/9
=7/29×3×(1/8+2/12+1/9)
=21/29×(1/8+2/12+1/9)
=21/29×29/72
=21/72
=7/24

Answer 4

把7/29提出来即7/29*(3/8+6/12+3/9)=7/24

Answer 5

=7/29*（3/8+1/2+1/3）
=7/29*29/24
=7/24
这种题你想尽办法拆分母就是了