使用简便方法计算
(1)3-7/12(2)5/7×3/8+5/8×7/5(3)8/15×5/16+27/÷10/9(4)18×(9/4+6/5)(5)3/2×7+3/2×5(6)(1/6-...
(1)3-7/12 (2)5/7×3/8 + 5/8×7/5 (3)8/15 × 5/16+27/ ÷10/9
(4)18×(9/4 + 6/5) (5)3/2×7+ 3/2×5 (6)( 1/6-1/12 )×24-5/4 展开
(4)18×(9/4 + 6/5) (5)3/2×7+ 3/2×5 (6)( 1/6-1/12 )×24-5/4 展开
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5212121214,你好:
我觉得你要简便计算,第2、3、4三题肯定打错了,我按我的理解做在下面,如果数据不是我这样的,可以百度HI联系我,谢谢!
(1)3-7/12
=2+(1-7/12)
=2+5/12
=2又5/12
(2)5/7×3/8 + 5/8×5/7
=5/7×(3/8+5/8)
=5/7×1
=5/7
(3)8/15 × 5/16+5/27÷10/9
=1/6+1/6
=1/3
(4)18×(4/9 + 5/6)
=18×4/9+18×5/6
=8+15
=23
(5)3/2×7+ 3/2×5
=3/2×(7+5)
=3/2×12
=18
(6)( 1/6-1/12 )×24-5/4
=24×1/6-24×1/12-5/4
=4-2-5/4
=2-5/4
=3/4
我觉得你要简便计算,第2、3、4三题肯定打错了,我按我的理解做在下面,如果数据不是我这样的,可以百度HI联系我,谢谢!
(1)3-7/12
=2+(1-7/12)
=2+5/12
=2又5/12
(2)5/7×3/8 + 5/8×5/7
=5/7×(3/8+5/8)
=5/7×1
=5/7
(3)8/15 × 5/16+5/27÷10/9
=1/6+1/6
=1/3
(4)18×(4/9 + 5/6)
=18×4/9+18×5/6
=8+15
=23
(5)3/2×7+ 3/2×5
=3/2×(7+5)
=3/2×12
=18
(6)( 1/6-1/12 )×24-5/4
=24×1/6-24×1/12-5/4
=4-2-5/4
=2-5/4
=3/4
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(1)3-7/12
=36/12-7/12
=29/12
(2)5/7×3/8 + 5/8×7/5
=15/56+35/40
=15/56+7/8
=15/56+49/56
=65/56
=1又9/56
(3)8/15 × 5/16+27/ ÷10/9
=1/6+243/10
=5/30+729/30
=734/10
=73又2/5
(4)18×(9/4 + 6/5)
=18X(45/20+24/20)
=18X69/20
=621/10
(5)3/2×7+ 3/2×5
=21/2+15/2
=36/2
=18
(6)( 1/6-1/12 )×24-5/4
=(2/12-1/12)X24-5/4
=2-5/4
=8/4-5/4
=3/4
=36/12-7/12
=29/12
(2)5/7×3/8 + 5/8×7/5
=15/56+35/40
=15/56+7/8
=15/56+49/56
=65/56
=1又9/56
(3)8/15 × 5/16+27/ ÷10/9
=1/6+243/10
=5/30+729/30
=734/10
=73又2/5
(4)18×(9/4 + 6/5)
=18X(45/20+24/20)
=18X69/20
=621/10
(5)3/2×7+ 3/2×5
=21/2+15/2
=36/2
=18
(6)( 1/6-1/12 )×24-5/4
=(2/12-1/12)X24-5/4
=2-5/4
=8/4-5/4
=3/4
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