求解答!!!!!!!!!!!
1个回答
2014-02-15
展开全部
(1)
(7/12-3/8)×24-5/9
=14-9-5/9
=5-5/9
=40/9
=4又4/9
(2)
5/16×4/7+1÷16/5+3/7×5/16
=5/16×(4/7+3/7)+5/16
=5/16+5/16
=5/8
(3)
9/14÷(5/6-3/4)×7/24
=9/14÷2/24×7/24
=9/14×24/2×7/24
=9/4
=2又1/4
(4)
9/32÷(3/4-(7/16-1/4))
=9/32÷(3/4-7/16+1/4)
=9/32÷9/16
=9/32×16/9
=1/2
(7/12-3/8)×24-5/9
=14-9-5/9
=5-5/9
=40/9
=4又4/9
(2)
5/16×4/7+1÷16/5+3/7×5/16
=5/16×(4/7+3/7)+5/16
=5/16+5/16
=5/8
(3)
9/14÷(5/6-3/4)×7/24
=9/14÷2/24×7/24
=9/14×24/2×7/24
=9/4
=2又1/4
(4)
9/32÷(3/4-(7/16-1/4))
=9/32÷(3/4-7/16+1/4)
=9/32÷9/16
=9/32×16/9
=1/2
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