1樓:匿名使用者
=(3/4-5/8)x9/5
=1/8x9/5
=9/40
(3/4-5/8)÷5/9?
2樓:匿名使用者
除法是可以轉化為乘法來做的。然後再用乘法分配律來做。
3樓:匿名使用者
3/4÷6/11+3/17+5/8
=11/8+3/17+5/8
=11/8+5/8+3/17
=2又3/17
4樓:龔成素
(3/4-5/8)/(5/9)
=(3/4-5/8)×9/5
=(6/8-5/8)×9/5
=1/8×9/5
=9/40
4÷8/3-5/9等於多少?計算簡便演算法。
5樓:使用者名稱用
4÷8/3-5/9計算過程如下
4÷8/3-5/9
=4×3/8-5/9
=3/2-5/9
=17/18
6樓:七色彩虹之毛毛
解:4÷8/3-5/9等於
( 17/18 )
∵已知需求出4÷8/3-5/9等於多少
∴4 ÷ 8/3 - 5/9
= 4 × 3/8 - 5/9
= 4/1 × 3/(2×4) - 5/9= 3/2 - 5/9
=(3×9)/(2×9) - (5×2)/(9×2)= 27/18 - 10/18
= 17/18
答:4÷8/3-5/9等於17/18
(5/8-1/4)÷(8/9+1/3)?
7樓:匿名使用者
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)
8樓:妙酒
(5/8-1/4)÷(8/9+1/3)
=3/8÷11/9
=27/88
(5/8-1/4)÷(8/9+1/3)
9樓:匿名使用者
(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
希望你能採納,評為最佳答案,謝謝!
10樓:匿名使用者
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.
原方程變為4.7x=6.1,解得:
x=61/476.原方程變為(3/4)x=5/6-1/3,即(3/4)x=1/2,所以x=(1/2)x(4/3)=2/3
11樓:世紀風霜
(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
12樓:淺愛琉璃
(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
4÷(8/3)-3/5?
13樓:匿名使用者
算式4÷8/3-3/5。
脫式4×3/8-3/5。
等於3/2-3/5,
通分15/10-6/10=9/10。
14樓:樂為人師
4÷(8/3)-3/5
=4×3/8-3/5
=3/2-3/5
=15/10-6/10
=9/10
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