5+5+5+5+6+5-6-9=
5+5+5+5+6+65+6+6+6+6+6+6+6+6+6+6+9+49+9+9+9+5+5+5+3+5
5 + 5 + 5 + 6 + 65 + 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 + 9 + 49 + 9 + 9 + 5 + 5 + 5 + 3 + 5 = 478.
* Chúc bạn học tốt !
Bài 1:Tính
1) (1/2)^3 (3/2)^2
2) (2/3)^3 (3/2)^5
3) (5/4)^5 (4/5)^7
4) (-5/6)^6 (6/5)^8
5)(-4/3)^3 (9/16)^5
6) (1/3)^4 (-9/2)^6
7)(-4/9)^3 (-27/20)^4
8) (0,2)^4 . 5^6
9) (-4/3)^3 (9/16)^5
10) (-0,2)^3 .(-5)^5
11) (-4)^4 .(0,25)^6
12) $^2 . (0,2)^3
13) (0,5)^2 . 2^4
14) (-0,5)^3 .2^6
15) (-0,5)^5 .(-2)^10
16) (0,125)^2 .8^4
17) (0,125)^5 . (-8)^4
18) (-0,125)^7 . 8^10
19) (-0,1)^4 . 10^7
20) (0,1)^5 . (-10)^10
Giúp mình với ạ,mình cảm ơn ạ
1: =1/8*9/4=9/32
2: =8/27*243/32=9/4
3: =(5/4*4/5)^5*(4/5)^2=16/25
4: \(=\left(-\dfrac{5}{6}\cdot\dfrac{6}{5}\right)^2\cdot\left(\dfrac{6}{5}\right)^2=\dfrac{36}{25}\)
5: \(=\left(-\dfrac{4}{3}\right)^3\cdot\left(\dfrac{3}{4}\right)^{10}=\left(-1\right)\left(\dfrac{3}{4}\right)^7=-\left(\dfrac{3}{4}\right)^7\)
6: \(=\left(\dfrac{1}{3}\cdot\dfrac{-9}{2}\right)^4\left(-\dfrac{9}{2}\right)^2=\left(-\dfrac{3}{2}\right)^4\cdot\dfrac{81}{4}=\dfrac{9}{4}\cdot\dfrac{81}{4}=\dfrac{729}{16}\)
8: =(0,2*5)^4*5^2=25
10: =-0,5^5*2^10
=-0,5^5*2^5*2^5
=-32
13: =(0,5*2)^2*2^2=4
5 + 6 + 9 + 5 + 6 + 2 + 5 +5 + 5+ 5 + 5 + 5 + 5 + 2 + 8 + 9 =?
5 + 6 + 9 + 5 + 6 + 2 + 5 +5 + 5+ 5 + 5 + 5 + 5 + 2 + 8 + 9 =87
vậy số đó là 87
.
5 + 6 + 9 + 5 + 6 + 2 + 5 +5 + 5+ 5 + 5 + 5 + 5 + 2 + 8 + 9
=( 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 +5 ) + ( 6 + 6 ) + ( 9 + 9 ) + ( 2 + 2 ) + 8
= ( 5 x 9 ) + 12 + 18 + 4 + 8
= 45 + ( 12 + 18 ) + ( 4 + 8 )
= 45 + 30 + 12
= 75 + 12
= 87
Hơi rắc rối nhưng vẫn tk mình nhé !
(4/9-3/5):6/5+(5/9+1/5):6/5
(4/9-3/5):6/5+(5/9+1/5):6/5
=-7/45:6/5+34/45:6/5
=-7/54+17/27
=1/2
(20/45-27/45):6/5+(25/45+9/45):6/5= -7/45:6/5+34/45:6/5= -7/45.5/6+34/45.5/6=5/6.(-7/45+34/45)=5/6.(27/45)=5/6.3/5=1/2
5+5+5+5+5+5+6-6+6-9-8=
>, <, = ?
10 … 5 + 5 | 9 … 2 + 8 | 6 … 6 – 1 |
9 … 5 + 5 | 10 … 7 + 1 | 5 + 2 … 5 + 3 |
2 + 6 … 3 + 2 | 4 + 4 … 5 + 3 | 4 + 5 … 5 + 4 |
Lời giải chi tiết:
10 = 5 + 5 | 9 < 2 + 8 | 6 > 6 – 1 |
9 < 5 + 5 | 10 > 7 + 1 | 5 + 2 < 5 + 3 |
2 + 6 > 3 + 2 | 4 + 4 = 5 + 3 | 4 + 5 = 5 + 4 |
9+2+5+3+7+8+4+7+4+7+2+4+2+9+6+4+65+6+7+4+6+4+6+3+7+4+8+5+9+08+87+1+2+3+4+2+3+2+5+6+767+5+75+6+4+6+5+66+5+7+546+46+43+6+3+6+4+6+7+8878+68+68+6+7+9+9
\(9+2+5+3+7+8+4+2+9+6+4+65+6+7+4+6+3+7+4+8+5+9+08+87+1+2+3+4+2+3+2+5+6+767+5+75+6+4+6+5+66+5+7+546+46+43+6+3+6+4+6+7+8878+68+68+6+7+9+9=10961\)
Quy đồng mẫu số : a) 6/7 và 5/11 b)5/9 và 9/5 C)3/8 và 5/24 D)6/5 và 5/6
a) \(\dfrac{6}{7}=\dfrac{6\times11}{7\times11}=\dfrac{66}{77}\) ; \(\dfrac{5}{11}=\dfrac{5\times7}{11\times7}=\dfrac{35}{77}\)
b) \(\dfrac{5}{9}=\dfrac{5\times5}{9\times5}=\dfrac{25}{45}\) ; \(\dfrac{9}{5}=\dfrac{9\times9}{5\times9}=\dfrac{81}{45}\)
c) \(\dfrac{3}{8}=\dfrac{3\times3}{8\times3}=\dfrac{9}{24}\) ; \(\dfrac{5}{24}\) giữ nguyên phân số
d) \(\dfrac{6}{5}=\dfrac{6\times6}{5\times6}=\dfrac{36}{30}\) ; \(\dfrac{5}{6}=\dfrac{5\times5}{6\times5}=\dfrac{25}{30}\)
\(#Wendy.Dang\)
a) 6/7 và 5/11
ta có :
6/7=66/77
5/11=35/77
b)5/9 và 9/5
ta có
5/9=25/45
9/5=81/45
C)3/8 và 5/24
ta có :
3/8=9/24
5/24
D)6/5 và 5/6
ta có
6/5=36/30
5/6=25/30
>, <, = ?/
6 + 3 … 9 | 3 + 4 … 5 + 3 | 4 + 5 … 5 + 4 |
9 – 2 … 6 | 9 – 0 …. 8 + 1 | 9 – 6 …. 8 – 6 |
Lời giải chi tiết:
6 + 3 = 9 | 3 + 4 < 5 + 3 | 4 + 5 = 5 + 4 |
9 – 2 > 6 | 9 – 0 = 8 + 1 | 9 – 6 > 8 – 6 |