1樓:匿名使用者
36/5 20 644/5 5/48
計算下面各題能簡算的要簡算 5/6-1/2+1/4 5/12+3/4-5/8 4/5-(3/10+1/6) 5/9+7/18+4/9 1-2/7-5/7
6/5-3/5÷(6/7)能簡算的要簡算
2樓:匿名使用者
6/5-3/5÷(6/7)
=3/5x7/6
=21/30
=7/10
3樓:寵愛此生
=6/5-3/5×7/6
=6/5-7/10
=12/10-7/10
=5/10
=1/2
3/7+1/2-3/7簡便計算5/7-1/6+5/14簡便計算7/12-(5/6-5/12)簡便計算2/3-1/2-1/18 5
4樓:淨壇使者
3/7 + 1/2 - 3/7
= 3/7 - 3/7 + 1/2
= 1/2
5/7 - 1/6 + 5/14
= 10/14 + 5/14 - 1/6
= 1 + 1/14 - 1 + 5/6
= 3/42 + 35/42
= 38/42
= 19/21
7/12 - ( 5/6 - 5/12 )= 7/12 - 5/6 + 5/12
= 1 - 5/6
= 1/6
2/3 - 1/2 - 1/18
= 12/18 - 9/18 - 1/18= 2/18
= 1/9
2x - 1/8 = 7/8
2x = 7/8 + 1/8
2x = 1
x = 1/2
x - 1/9 - 8/9 = 2
x - 1 = 2
x = 2 + 1
x = 3
5樓:匿名使用者
真是閒的蛋疼,這題就是寫出來消磨時間的!
求簡單計算方法1/2+2/3+3/4+4/5+5/6+6/7+7/8+8/9+9/10=?
6樓:匿名使用者
1/2+2/3+3/4+4/5+5/6+6/7+7/8+8/9+9/10
=9-(1/2+1/3+1/6)-(1/4+1/8)-(1/5+1/10)-1/7-1/9
=9-1-3/8-3/10-1/7-1/9=8-2341/2520
=7又2520分之179
7樓:6紅1藍
=(1-1/2)+(1-1/3)+...(1-1/10)=9-(1/2+1/3+...1/10)
=9-[1/2+1/3+1/4+1/5+1/6+1/7+1/8+1/9+1/10]
=9-[(1/2+1/3+1/6)+(1/4+1/5+1/10)+1/7+1/8+1/9]
=9-(1+11/20+1/8+1/7+1/9)=9-(1+27/40+1/9+1/7)
=9-(1+283/360+1/7)
=8-2341/2520
24÷6/7x5/14,(2/3-1/9)÷4/9要簡算 20
8樓:樂觀的愛數
24÷6/7x5/14
=24x7/6x5/14 (約分)=2x5
=1o(2/3-1/9)÷4/9
=2/3x9/4一1/9x9/4
=3/2-1/4
=5/4要簡算
9樓:艾康生物
24/6/7*5/14=24*7/6*5/14=24*5/12=10
(2/3-1/9)/4/9=2/3/4/9-1/9/4/9=3/2-1/4=5/4
10樓:匿名使用者
24÷6/7x5/14=24*49/15=392/5
(2/3-1/9)÷4/9=5/9*9/4=5/4
計算下面各題,能簡便計算的用簡便方法計算 2-6/13÷9/26 (1/3+1/4)×36 6/7×(4/5-2/3)÷1/5
11樓:數學新綠洲
2-6/13÷9/26
= 2- (6/13)×(26/9)
=2- 4/3
=2/3
.(1/3+1/4)×36
=(1/3)×36 +(1/4)×36
=12+9
=21.
6/7×(4/5-2/3)÷1/5
=(6/7)×(4/5 - 2/3)×5
=(6/7)×(4 - 10/3)
=(6/7)×(2/3)
=4/7
.3/4-3/4×4/7+9/7
=(3/4)×(1- 4/7)+
9/7=(3/4)×(3/7)+9/7
=(1/4)×(9/7)+ 9/7
=(1/4 +1)×(9/7)
=(5/4)×(9/7)
=45/28
=1又17/28
簡便計算 1/5÷(1-1/3×1/2) 9/10×【7/8÷(4/5+1/4)】 (1/4-1/4×1/2)÷1/4 5/6+9/ 10
12樓:凌月霜丶
簡便計算
1/5÷(1-1/3×1/2)
=1/5÷(1-1/6)
=1/5*6/5
=6/25
直接計算
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