用简便方法计算！谢
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(1)
= 7 - 36×1/12-36×1/8
= 7 - 3 - 2
= 2
(2)
= 2/3×15/8÷25/4
= 2/3×15/8×4/25
= 1/3×15/25
= 1/5
(3)
=4×8/3+1/3×5/3
= (3+1)×8/3+1/3×5/3
= 8+8/3+5/9
= 8+3-1/3+5/9
= 11+2/9
= 11又2/9
= 7 - 36×1/12-36×1/8
= 7 - 3 - 2
= 2
(2)
= 2/3×15/8÷25/4
= 2/3×15/8×4/25
= 1/3×15/25
= 1/5
(3)
=4×8/3+1/3×5/3
= (3+1)×8/3+1/3×5/3
= 8+8/3+5/9
= 8+3-1/3+5/9
= 11+2/9
= 11又2/9
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