Tính biểu thức sau:
0,35 x 16 : 0,28 - ( 2,34 + 1,17 : 4,5 ) : 0,25
giúp mik giải toán này nhanh vs ạk mik cần ấp ạk
giúp mik vs ạk, mik cần gấp
Giải dùm mik mấy câu này vs ạk Thank nhìu
1..so I tired
2..I tried my best
3.. the most beautiful place in the world
4..tease the dog
1The children are playing football at the moment
2I haven't met Lan for a long time
Ảnh 1:
1. I stayed up late, so I am tired
2. I did not pass my exam although I tried my best
3. My homeland is the best beautiful place in the world
4. Don't tease the dog
Ảnh 2:
1. The children are playing football at the moment
2. I hasn't met Lan for a long time
Giải giúp mik vs ạk Cảm ơn
28 I haven't gone to HCM City for 2 years
29 We have lived in My Tho for ten years
30 Lan didn't go to school last week
31 He was at home yesterday
Question8:
29. We live in Phu Tho about ten years.
30. I will see him tomorrow.
31. Lan didn't go to school last week
32. He was at home yesterday.
tính giá trị biểu thức
0,35 x 135 - 35% x 35
các bạn ơi giúp mik với
mik đang cần gấp ai nhanh mik tick nhé
0,35 × 135 - 35% × 35
= 0,35 × 135 - 0,35 × 35
= 0,35 × (135 - 35)
= 0,35 × 100
= 35
\(0,35\times135-35\%\times35\)
\(=0,35\times135-0,35\times35\)
\(=0,35\times\left(135-35\right)\)
\(=0,35\times100\)
\(=35\)
bạn Linh và Phong ơi nếu hai bạn rảnh thì giúp mik 1 bài nữa được ko
các bạn vào trang cá nhân của mik thấy câu có 50 % thì giúp mik với nhé
tính giá trị biểu thức
0,35 x 135 - 35% x 35
các bạn ơi giúp mik với
mik đang cần gấp
ai nhanh mik tick nhé
=35*1,35-35*0,35
=35(1,35-0,35)
=35*1
=35
tính giá trị biểu thức
0,35 x 135 - 35% x 35
các bạn ơi giúp mik với
mik đang cần gấp
\ai nhanh mik tick nhé
\(0,35x135-35\%x35=0,35x\left(100+35\right)-0,35x35=0,35x100+0,35x35-0,35x35=35\)
Giúp mik bài 4 nhanh vs ạk, cảm ơn ae nhìu😁
4P+5O2-to>2P2O5
0,2-------0,08 mol
n P=\(\dfrac{6,4}{31}\)=\(\dfrac{32}{155}\) mol
n O2=\(\dfrac{4,48}{22,4}=0,2mol\)
=>P dư
m P dư =\(\dfrac{9}{775}\).31=0,36g
=>m P2O5= 0,08.142=11,36g
.
giúp mik vs ạk. mik c.ơn ạ
Bài 3:
a) \(\left(-\dfrac{2}{3}\right)^2\cdot\left(\dfrac{2}{3}\right)^5\)
\(=\left(\dfrac{2}{3}\right)^2\cdot\left(\dfrac{2}{3}\right)^5\)
\(=\left(\dfrac{2}{3}\right)^{2+5}\)
\(=\left(\dfrac{2}{3}\right)^7\)
b) \(\left(-\dfrac{1}{2}\right)^5\cdot\left(-\dfrac{1}{2}\right)^3\)
\(=\left(-\dfrac{1}{2}\right)^{5+3}\)
\(=\left(-\dfrac{1}{2}\right)^8\)
\(=\left(\dfrac{1}{2}\right)^8\)
c) \(\left(\dfrac{6}{5}\right)^7\cdot\left(-\dfrac{6}{5}\right)^4\)
\(=\left(\dfrac{6}{5}\right)^7\cdot\left(\dfrac{6}{5}\right)^4\)
\(=\left(\dfrac{6}{5}\right)^{7+4}\)
\(=\left(\dfrac{6}{5}\right)^{11}\)
Bài 4:
a) \(\left(\dfrac{3}{7}\right)^4:\left(-\dfrac{3}{7}\right)^2\)
\(=\left(\dfrac{3}{7}\right)^4\cdot\left(\dfrac{3}{7}\right)^2\)
\(=\left(\dfrac{3}{7}\right)^{4+2}\)
\(=\left(\dfrac{3}{7}\right)^6\)
b) \(\left(\dfrac{5}{9}\right)^{11}:\left(\dfrac{5}{9}\right)^7\)
\(=\left(\dfrac{5}{9}\right)^{11-7}\)
\(=\left(\dfrac{5}{9}\right)^4\)
c) \(\left(\dfrac{2}{13}\right)^7:\left(\dfrac{2}{13}\right)^5\)
\(=\left(\dfrac{2}{13}\right)^{7-5}\)
\(=\left(\dfrac{2}{13}\right)^2\)
Bài 5:
a) \(\left(\dfrac{2}{3}\right)^0\cdot\left(\dfrac{2}{3}\right)^5\)
\(=1\cdot\left(\dfrac{2}{3}\right)^5\)
\(=\left(\dfrac{2}{3}\right)^5\)
b) \(\left(\dfrac{3}{5}\right)^7\cdot\left(\dfrac{3}{5}\right)^8\)
\(=\left(\dfrac{3}{5}\right)^{7+8}\)
\(=\left(\dfrac{3}{5}\right)^{15}\)
c) \(\left(-\dfrac{2}{7}\right)^9\cdot\left(-\dfrac{2}{7}\right)^{11}\)
\(=\left(-\dfrac{2}{7}\right)^{9+11}\)
\(=\left(-\dfrac{2}{7}\right)^{20}\)
Tính nhanh
a) 19/27+9/7+6/27+5/7+2/27
b) 2/7+27/48+7/16+45/63
Mn ơi giải giúp mình vs ạk. Gấp gấp ạk
a) \(\frac{19}{27}+\frac{9}{7}+\frac{6}{27}+\frac{5}{7}+\frac{2}{27}\)
\(=\left(\frac{19}{27}+\frac{6}{27}+\frac{2}{27}\right)+\left(\frac{9}{7}+\frac{5}{7}\right)\)
\(=1+2=3\)
b) \(\frac{2}{7}+\frac{27}{48}+\frac{7}{16}+\frac{45}{63}\)
\(=\frac{2}{7}+\frac{9}{16}+\frac{7}{16}+\frac{5}{7}\)
\(=\left(\frac{2}{7}+\frac{5}{7}\right)+\left(\frac{9}{16}+\frac{7}{16}\right)\)
\(=1+1=2\)