1楼:匿名用户
①( 5/8 - 1/4 ) ÷ ( 8/9 + 1/3 )= ( 5/8 - 2/8 ) ÷ ( 8/9 + 3/9 )= 3/8 ÷ 11/9
= 3/8 ×
9/11
= 27/88
② 3/8 + 3/4 × 2/3 ÷ 6= 3/8 + 12/12 ÷ 6
= 3/8 + 6/12
= 3/8 + 1/2
= 3/8 + 4/8
= 7/8
③ (1/4 + 1/5)×4×5
= (1/4 + 1/5)× 20
= 1/4 × 20 + 1/5 × 20= 5 + 4
= 9④ 3/5 +(1 - 7/10)÷ 3/20= 3/5 + 3/10 × 20/3
= 3/5 + 60/30
= 3/5 + 2
= 3/5 + 10/5
= 13/5
⑤ 4.5x + 0.2x = 6.1
4.7 x = 6.1
x = 6.1 / 4.7
x = 61/47
⑥ 3/4x - 1/3 = 5/6
(3/4) x = 5/6 + 2/6
(3/4) x = 7/6
x = 7/6 ÷ 3/4
x = 7/6 × 4/3
x = 28/18
x = 14/9
(5/8-1/4)÷(8/9+1/3)
2楼:匿名用户
(5/8-1/4)÷(8/9+1/3)=3/8÷11/9=27/883/8+3/4×2/3÷6=3/8+1/2÷6=3/8+1/12=11/24
(1/4+1/5)×4×5=9/20×4×5=93/5+(1-7/10)÷3/20=3/5+3/10×20/3=3/5+2=13/5
4.5x+0.2x=6.1
4.7x=6.1
x=61/47
3/4x-1/3=5/6
3/4x=5/6+1/3
3/4x=7/6
x=14/9
希望你能采纳,评为最佳答案,谢谢!
3楼:匿名用户
1.原式=(5/8-2/8)÷(8/9+3/9)=(3/8)÷(11/9)=27/88
2.原式=3/8+1/2x1/6=3/8+1/12=9/24+2/24=11/24
3.原式=(5/20+4/20)x20=(9/20)x20=94.原式=3/5+(3/10)÷(3/20)=3/5+2=13/55.
原方程变为4.7x=6.1,解得:
x=61/476.原方程变为(3/4)x=5/6-1/3,即(3/4)x=1/2,所以x=(1/2)x(4/3)=2/3
4楼:世纪风霜
(5/8-1/4)÷(8/9+1/3)
=(5/8-2/8)÷(8/9+3/9)
=3/8÷11/9
=3/8×9/11
=27/88
3/8+3/4×2/3÷6
=3/8+1/2÷6
=3/8+1/2×1/6
=3/8+1/12
=9/24+2/24
=11/24
(1/4+1/5)×4×5
=1/4+×4×5+1/5×4×5
=1×5+1×4
=5+4
=93/5+(1-7/10)÷3/20
=3/5+3/10÷3/20
=3/5+2
=3/5+10/5
=13/5
4.5x+0.2x=6.1(方程)
4.7x=6.1
x=47/61
3/4x-1/3=5/6(方程)
3/4x=5/6+1/3
3/4x=5/6+2/6
3/4x=7/6
x=7/6÷3/4
x=7/6×4/3
x=14/9
5楼:浅爱琉璃
(5/8-1/4)÷(8/9+1/3)
=(5/8-2/8)÷(8/9+3/9)
=(3/8)÷(11/9)
=3/8 *9/11
=27/88
(5/8-1/4)÷(7/9+1/3)
6楼:枫叶
(5/8-1/4)÷(7/9+1/3)
=3/8÷10/9
=80分之27
你好,本题已解答,如果满意
请点右下角“采纳答案”。
7楼:匿名用户
(5/8-1/4)÷(7/9+1/3)
=3/8÷4/9
=3/8×9/4
=27/32
(5/8-1/4)÷(8/9+1/3)
8楼:妙酒
(5/8-1/4)÷(8/9+1/3)
=3/8÷11/9
=27/88
5/8-1/4×(8/9÷2/3)
9楼:小辣
5/8-1/4×(8/9÷2/3)
=5/8-1/4×4/3
=5/8-1/3
=15/24-8/24
=7/24
10楼:匿名用户
5/8-1/4×(8/9÷2/3)
=5/8-1/4x4/3
=15/24-8/24
=7/24
5/8-1/4x(8/9÷2/3)
11楼:春花秋月季
=5/8-1/4(8/9×3/2)
=5/8-1/4×4/3
=5/8-1/3
=(15-8)/24
=7/24
(5/8+1/4)÷(2/3-1/2)括号的简便方法怎么做?
12楼:匿名用户
(5/8+1/4)÷(2/3-1/2)
=7/8÷1/6
=7/8×6
=21/4
=5又1/4
(3/8-1/4)÷(8/9×3/4)
13楼:匿名用户
(3/8-1/4)÷(8/9×3/4)
=5/8÷24/36
=5/8×3/2
=15/16
真希望能帮到你!满意请采纳!
1.75×6/7+3/14×7/4+7/4 (5/8-1/4)÷(8/9+1/3) 1/42+1/56+1/72+1/90+1/110+1/132
14楼:匿名用户
1.75×6/7+3/14×7/4+7/4=7/4x6/7+3/14x7/4+7/4= (6/7+3/14+1)x7/4
=(12/14+3/14+14/14)x7/4=29/14x7/4
=29/8
5/8-1/4)÷(8/9+1/3)
=(5/8-2/8)÷(8/9+3/9)
=3/8÷11/9
=3/8x9/11
=27/88
1/42+1/56+1/72+1/90+1/110+1/132=1÷(42+56+72+90+110+132)=1÷502
=1/502
8-1 4等于多少,1/8-1/4等于多少?
1楼 晓风残血引悲凉 负四分之一, 1 4 2楼 匿名用户 1 8 2 8 1 8 3楼 匿名用户 等于 负1 8 4楼 匿名用户 答案是 1 4 负 3 8 1 4,等于多少,怎么算? 5楼 养活 你好,很高兴地解答你的问题。 解析 8和4的最大公因数是 详解 8 2 2 2 4 2 2 最大公因...
3-1 4)3 8+8 ,(2/3-1/4)÷3/8+8/9=?
1楼 匿名用户 2 3 1 4 3 8 8 9 8 12 3 12 x8 3 8 9 5 12x8 3 8 9 10 9 8 9 18 9 2 2楼 匿名用户 2 3 1 4 3 8 8 9 8 12 3 12 3 8 8 9 5 12 8 3 8 9 10 9 8 9 18 9 2 括号2 3 1...
(简便计算1—,【简算】 (3/4-2/3)÷1/5 4/5×7/8+7/8÷5 (1-8/15×3/4)÷3/5 (3/8+2/17)×8+1/17
1楼 温柔 黏喻勊 计算器1 5 8 25 28 3 10 0 69910714285714 计算器4 5 7 8 7 8 5 0 875 简算 3 4 2 3 1 5 4 5 7 8 7 8 5 1 8 15 3 4 3 5 3 8 2 17 8 1 17 2楼 新野旁观者 3 4 2 3 1 5...