136+12=?
356+35=?
giúp em đi ạ
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17 tháng 8 2021
a: \(\sqrt{5+2\sqrt{6}}=\sqrt{3}+\sqrt{2}\)
b: \(\sqrt{12+2\sqrt{35}}-\sqrt{12-2\sqrt{35}}=\sqrt{7}+\sqrt{5}-\sqrt{7}+\sqrt{5}=2\sqrt{5}\)
c: \(\sqrt{16+6\sqrt{7}}=4+\sqrt{7}\)
d: \(\sqrt{31-12\sqrt{3}}=3\sqrt{3}-2\)
e: \(\sqrt{27+10\sqrt{2}}=5+\sqrt{2}\)
f: \(\sqrt{14+6\sqrt{5}}=3+\sqrt{5}\)
NV
ai giải giúp em từ 3 đến bài 12 với ạ em đang cần gấp chiều em đi thi ạ
2
22 tháng 12 2021
356x41+356x35+356x23+356
=356x(41+35+23+1)
=356x100
=35600
PT
30 tháng 8 2021
\(\left(x-39\right)\div18=12\\ x-39=12\cdot18\\ x-39=216\\ x=216+39\\ x=255\)
12 tháng 10 2020
\(12:\left\{390:\left[500-\left(5^3+7^2.5\right)\right]\right\}\)
\(=12:\left\{390:\left[500-\left(125+49.5\right)\right]\right\}\)
\(=12:\left\{390:\left[500-\left(125+245\right)\right]\right\}\)
\(=12:\left[390:\left(500-370\right)\right]\)
\(=12:\left(390:130\right)\)
\(=12:3\)
\(=4\)
12 tháng 10 2020
12 : { 390 : [ 500 - ( 53 + 72 . 5 ) ] }
= 12 : { 390 : [ 500 - (125 + 49 . 5 ) ] }
= 12 : { 390 : [ 500 - (125 + 245 ) ] }
= 12 : { 390 : [ 500 - 370] }
= 12 : { 390 : 130}
= 12 : 3
= 4
Xin mời XD
giải giúp em bài 11 12 13 của bài 14 đi ạ
AH
Akai Haruma
Giáo viên
26 tháng 6 2021
11.
\(=\frac{\sqrt{x}-3}{2-\sqrt{x}}+\frac{\sqrt{x}-2}{3+\sqrt{x}}+\frac{9-x}{(2-\sqrt{x})(\sqrt{x}+3)}\)
\(=\frac{(\sqrt{x}-3)(\sqrt{x}+3)}{(2-\sqrt{x})(\sqrt{x}+3)}+\frac{\sqrt{x}-2}{3+\sqrt{x}}+\frac{9-x}{(2-\sqrt{x})(\sqrt{x}+3)}\)
\(=\frac{x-9}{(2-\sqrt{x})(\sqrt{x}+3)}+\frac{\sqrt{x}-2}{3+\sqrt{x}}+\frac{9-x}{(2-\sqrt{x})(\sqrt{x}+3)}\)
\(=\frac{\sqrt{x}-2}{3+\sqrt{x}}\)
AH
Akai Haruma
Giáo viên
26 tháng 6 2021
12.
\(=\frac{(3-\sqrt{x})(3\sqrt{x}-2)+(5\sqrt{x}+7)(3\sqrt{x}+4)}{(5\sqrt{x}+7)(3\sqrt{x}-2)}-\frac{42\sqrt{x}+34}{(5\sqrt{x}+7)(3\sqrt{x}-2)}\)
\(=\frac{12x+52\sqrt{x}+22}{(5\sqrt{x}+7)(3\sqrt{x}-2)}-\frac{42\sqrt{x}+34}{(5\sqrt{x}+7)(3\sqrt{x}-2)}\)
\(=\frac{12x+10\sqrt{x}-12}{(5\sqrt{x}+7)(3\sqrt{x}-2)}=\frac{2(3\sqrt{x}-2)(2\sqrt{x}+3)}{(5\sqrt{x}+7)(3\sqrt{x}-2)}=\frac{2(2\sqrt{x}+3)}{5\sqrt{x}+7}\)
TN
23 tháng 5 2016
3,2 + 4,65 : 1,5
=3,2+3,1
=6,3
347 + 418 + 123 + 12
=(347+123)+(418+12)
=470+430
=900
34 x 35 + 35 x 38 + 65 x 40 + 65 x 32
=35*(34+38)+65*(32+40)
=35*72+65*72
=72*(35+65)
=72*100
=7200
19 x 16 x 4 + 76 x 34
=76*16+76*34
=76*(16+34)
=76*50
=3800
136 x 68 + 16 x2 x 136
=136*68+32*136
=136*(68+32)
=136*100
=13600
125 x 25 + 125 x 74 + 125
=125*(25+74+1)
=125*100
=12500
DT
Đỗ Thanh Hải
CTVVIP
3 tháng 10 2021
11. If you knew Japanese, you would understand what I mean.
→ Were ........you to know Japanese, you would understand what I mean.....................................................
12. If I were a bird, I would fly.
→ Were ..........I a bird, I would fly. ..................................................
13. If you had trained harder, you would have won the game.
→ Had ....you trained harder, you would have won the game.........................................................
14. If I were you, I would not behave in such a polite manner in front of my boss.
→ Were .......I you, I would not behave in such a polite manner in front of my boss......................................................
15. If I studied at a prestigious university, I would have the opportunity to work abroad.
→ Were ........I to study at a prestigious university, I would have the opportunity to work abroad. ....................................................
16. If he has a temperature, he will see the doctor.
→ Should..........he have a temperature, he will see the doctor...................................................
17. If my friends come, I will be very happy.
→ Should.........my friend come, I will be very happy....................................................
18. If she had earned a lot of money, she would have flown to New York.
→ Had .....she earned a lot of money, she would have flown to New York.......................................................
19. If I knew your father, I would tell him to help you practice harder.
→ Were............I to know your father, I would tell him to help you practice harder.................................................
20. If she needs some more money, she can take an extra 200.
→ Should.......she need some more money, she can take an extra 200.....................................................
136 + 12 = 248
356 + 35 = 391
HT
136+12=148
356+35=391