递等式计算题5⼀6-3⼀4+1⼀3 11⼀12-(1⼀6-1⼀8) 7⼀12-(3⼀4-1⼀2) 1⼀2-(3⼀4-3⼀8)

2025-03-03 08:15:44
推荐回答(2个)
回答1:

您好:

5/6-3/4+1/3
=10/12-9/12+4/12
=5/12

11/12-(1/6-1/8)
=22/24-4/24+3/24
=21/24
=7/8

7/12-(3/4-1/2)
=7/12-1/4
=1/3

1/2-(3/4-3/8)
=1/2-3/8
=1/8

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回答2:

5/6-3/4+1/3(通分)
=10/12-9/12+4/12
=1/12+4/12
=5/12

11/12-(1/6-1/8)
=11/12-1/6+1/8(通分)
=22/24-4/24+3/24
=18/24+3/24
=21/24(约分)
=7/8

7/12-(3/4-1/2)
=7/12-3/4+1/2(通分)
=7/12-9/12+6/12
=13/12-9/12
=4/12
=1/3

1/2-(3/4-3/8)
=1/2-3/4+3/8
=8/16-12/16+6/16
=14/16-12/16
=2/16
=1/8