Câu 6, Tính
{210:[16+3.(6+3.2^2)]}-3
a 210:[16+3.(6+3.2^2)]}-3
b 500-{5[409-(2^3.3-21)^2]}-3
c 80-(4.5^2-3.2^3)
d 5^6:5^4+2^3.2^2-1
mình đang gấp
sos
a) 210:[16+3.(6+3.2^2)]-3
=210:[16+3.(6+3.4)]-3
=210:[16+3.(6+12)]-3
=210:[16+3.18]-3
=210:[16+54]-3
=210:70-3
=3-3
=0
\(500-\left\{5.\left[409.\left(2^3.3-21\right)^2\right]\right\}-3\)
500-{5.[409.(8.3-21)^2]}-3
500-{5.[409.(24-21)^2]}-3
500-{5.[409.3^2]}-3
500-{5.[409.9]}-3
500-{5.3681}-3
500-18405-3
...............
tự làm nốt nha
Đặt dấu () để thành phép tính đúg
6+2.4-3.2=16
tính nhanh hộ mình 2 câu này với :
1*2+2*4+3*6+4*8+5*10 / 3*4+6*8+9*12+12*16+15*20
2*4+2*4*8+4*8*16+8*16*32 / 3*4+2*6*8+4*12*168*24*32
a)
\(\frac{1.2+2.4+3.6+4.8+5.10}{3.4+6.8+9.12+12.16+15.20}\)
\(\frac{2.3\left(1.2\right)+2.3\left(2.4\right)+2.3\left(3.6\right)+2.3\left(4.8\right)+2.3\left(5.10\right)}{3.4\left(3.4+6.8+9.12+12.16+15.20\right)}\)
\(=\frac{\left(3.4+6.8+9.12+12.16+15.20\right)}{2.3\left(3.4+6.8+9.12+12.16+15.20\right)}=\frac{1}{2.3}=\frac{1}{6}\)
{210:[16+3.(6+3. 2 mũ 2)]}
\(\left\{210:\left[16+3\cdot\left(6+3\cdot2^2\right)\right]\right\}\)
\(=210:\left[16+3\cdot\left(6+3\cdot4\right)\right]\)
\(=210:\left[16+3\cdot\left(6+12\right)\right]\)
\(=210:\left(16+3\cdot18\right)\)
\(=210:\left(16+54\right)\)
\(=210:70\)
\(=3\)
#Urushi
{210:[16+3.(6+3. 2^2)]}
={210:[16+3.(6+12)]}
={210:[16+3.18]}
={210:70}
=3
{210:[16+3⋅(6+3⋅22)]}=210:[16+3⋅(6+12)]
=210:(16+3.18)
=210:70=3
210÷[16+3 (6+3×2^2)-3
210 : [ 16 + 3 (6 + 3 . 2\(^2\)) - 3
= 210 : 70 -3
= 3 - 3
=0
{ 210 : [ 16 + 3 . ( 6+3 . 22 ) ] } - 3
\(\left\{210:\left[16+3.\left(6+3.2^2\right)\right]\right\}-3\)
\(=\left\{210:\left[16+3.\left(6+12\right)\right]\right\}-3\)
\(=\left\{210:\left[16+3.18\right]\right\}-3\)
\(=\left\{210:\left[16+54\right]\right\}-3\)
\(=\left\{210:70\right\}-3=3-3=0\)
3 mũ 6. 4 mũ 6
8 mũ 2. 2 mũ 3. 16 mũ 2
2 mũ 3.2 mũ 2.8 mũ 3
y.y mũ 7
36 . 46 = (3.4)6 = 126
82 . 23 . 162 = (23)2 . 23 . (24)
= 26 . 23 . 24 = 26 + 3 + 4 = 213
23 . 22 . 83 = 23 . 22 . (23)3
= 23 . 22 . 29 = 23 + 2 + 9 = 214
y. y7 = y1 + 7 = y8
\(3^6\cdot4^6=\left(3\cdot4\right)^6=12^6\)
\(8^2\cdot2^3\cdot16^2=\left(2^3\right)^2\cdot2^3\cdot\left(2^4\right)^2\)
\(=2^6\cdot2^3\cdot2^8=2^{17}\)
\(2^3\cdot2^2\cdot8^3=2^5\cdot\left(2^3\right)^3\)
\(2^5\cdot2^9=2^{14}\)
\(y\cdot y^7=y^{1+7}=y^8\)
36 . 46
= ( 3 . 4 )6
= 126
82 . 23 . 162
= ( 23 )2 . 23 . ( 24 )2
= 26 . 23 . 28
= 26+3+8
= 217
23 . 22 . 83
= 23 . 22 . ( 23 )3
= 23 22 . 29
= 23+2+9
= 214
y . y7
= y1 . y7
= y1+7
= 78
9-6:3.2=?
(-14)+(-350)+(-16)+350=?
8.26+8.74-800=?
3-5^4: 5^3 + 3^3=?
{210:[16+3.(6+3.22)]}–3
\(\left\{210:\left[16+3.\left(6+3.22\right)\right]\right\}-3\)
\(=\left\{210:\left[16+3.\left(6+66\right)\right]\right\}-3\)
\(=\left\{210:\left[16+3.72\right]\right\}-3\)
\(=\left\{210:\left[16+216\right]\right\}-3\)
\(=\left\{210:232\right\}-3\)
\(=\dfrac{105}{116}-3\)
\(=\dfrac{-243}{116}\)