Tính : D=723 x 542 : 1084
E=310 x 11 x 5 : 39 x 24
4^15 x 5^30
27^16 x 9^10
A=72^3 X 54^2 : 1084
B=3^10 x 11 + 3^10 x 5 : 39x 24
giúp em với
\(4^{15}.5^{30}=\left(2^2\right)^{15}.5^{30}=2^{30}.5^{30}=\left(2.5\right)^{30}=10^{30}\)
\(27^{16}.9^{10}=\left(3^3\right)^{16}.\left(3^2\right)^{10}=3^{48}.3^{20}=3^{68}\)
\(\frac{72^3.54^2}{1084}=\frac{\left(2^3.3^2\right)^3.\left(2.3\right)^2}{2^2.271}=\frac{2^2.2^9.3^6.3^2}{2^2.271}=\frac{2^9.3^8}{271}\)
\(\frac{3^{10}.11+3^{10}.5}{39.24}=\frac{3^{10}.16}{39.24}=\frac{3.3.3^8.2.8}{3.13.3.8}=\frac{3^8.2}{13}\)(Cái này đoán đề thoi, thật sự câu này viết đề chả hiểu gì)
Tính Nhanh:
a) 3 x 7 x 9 / 7 x 5 x 3
b)6 x 8 x 11/ 16 x 24
c) 15 x 12 x 7/ 14 x 25 x 18
d) 118 x 13 - 13 x 18/ 79 + 21
e) 111 + 111 x 63 - 14 x 111
f) 126 - 27 + 74 - 73/ 21 x 11 + 39 x 21
G)146 x 21 + 146 - 46 x 22/ 88 x 25
Giúp vs mn
A) 72³ . 54² phần 1084
B) 3¹⁰ . 11 + 3¹⁰ . 5 phần 39 . 24
Mik cần gấp lắm:(
Tính giá trị biểu thức :
a) 310 + 24 – 65 = ..... = .....
b) 275 + 58 x 2 = ..... = .....
c) 52 – 4 x 9 = ..... = .....
d) 63 : 7 x 8 = ..... = .....
a) 310 + 24 – 65 = 334 – 65 = 269
b) 275 + 58 x 2 = 275 + 116 = 391
c) 52 – 4 x 9 = 52 – 36 = 16
d) 63 : 7 x 8 = 9 x 8 = 72
1.Tìm x
a) 310-(118-x)=217
b) 814-(x-305)=712
c)5(x+35)=515
d)(6.x-39):3].28=5628
e)2.x-138=23.22
g)20-[7.(x-3)+4]=2
a) 310-(118-x)=217
118-x=310-217
118-x=93
x=118-93
x=25
b) 814-(x-305)=712
x-305=814-712
x-305=102
x =102+305
x = 407
c)5(x+35)=515
x+35 =515:5
x+35 =103
x =103-35
x =68
\(a,310-\left(118-x\right)=217\) \(c,5\left(x+35\right)=515\)
\(118-x=310-217\) \(x+35=515:5\)
\(118-x=93\) \(x+35=103\)
\(x=118-93\) \(x=103-35\)
\(x=25\) \(x=68\)
\(b,814-\left(x-305\right)=712\) \(\left[\left(6.x-39\right):3\right].28=5628\)
\(x-305=814-712\) \(\left(6.x-39\right):3=5628:28\)
\(x-305=102\) \(\left(6.x-39\right):3=201\)
\(x=102+305\) \(6.x-39=201x3\)
\(x=407\) \(6.x-39=603\)
\(6x=603+39\)
\(6x=642\)
\(x=107\)
\(e,2.x-138=2^3.2^2\)
\(2.x-138=32\)
\(2.x=32+138\)
\(2.x=170\)
\(x=170:2\)
\(x=85\)
310 - ( 118-x) = 217
118 - x = 310 - 217
118 -x = 93
x = 118 - 93
x = 25
Mik cần gấp lắm giúp mik vs mn
A)72³ . 54² phần 1084
B) 3¹⁰ . 11 + 3¹⁰ . 5 phần 39 . 24
Chiều phải nộp r:(
72^3*54^2=1088391168
108^4=136048896
bạn chấm điểm cho mik với nhé ;)))
câu b
3^10.11+3^10x5 = 3^10.16 = 3.3.3^8.2.8 =3^8.2
39.24 39.24 3.13.3.8 13
mik ghi xuống dòng như vậy là giống phân số á bn, lm đúng ko thì ko chắc :)))
giải cho mik rõ ràng và chi tiết nha , giải hộ mik điiiii nha
Bài 3 : Tính bằng cách thuận tiện :
a) 28.400 : ( 100 x 311 - 310 x 100 ) ; b) \(\dfrac{5}{11}+\dfrac{19}{15}\)+ \(\dfrac{6}{11}+\dfrac{11}{16}\)+ \(\dfrac{6}{15}+\dfrac{5}{16}\)
dấu . là nhân hay là phần ngăn cách ở hàng phần nghìn thế
a) \(28400:\left(100\times311-310\times100\right)\)
\(=28400:\left[\left(311-310\right)\times100\right]\)
\(=28400:100\)
\(=284\)
b) \(\dfrac{5}{11}+\dfrac{19}{15}+\dfrac{6}{11}+\dfrac{11}{16}+\dfrac{6}{15}+\dfrac{5}{16}\)
\(=\left(\dfrac{5}{11}+\dfrac{6}{11}\right)+\left(\dfrac{19}{15}+\dfrac{6}{15}\right)+\left(\dfrac{11}{16}+\dfrac{5}{16}\right)\)
\(=1+\dfrac{5}{3}+1\)
\(=\dfrac{8}{3}+1\)
\(=\dfrac{11}{3}\)
a) 28.400 : ( 100 x 311 - 310 x 100 )
= 28.400 : [ 100 x ( 311 - 310 ]
= 28.400 : 100 x 1
= 0.284 x 1
= 0.284
b) \(\dfrac{5}{11}+\dfrac{19}{15}+\dfrac{6}{11}+\dfrac{11}{16}+\dfrac{6}{15}+\dfrac{5}{16}\)
\(=\left(\dfrac{5}{11}+\dfrac{6}{11}\right)+\left(\dfrac{19}{15}+\dfrac{6}{15}\right)+\left(\dfrac{11}{16}+\dfrac{5}{16}\right)\)
\(=1+\dfrac{5}{3}+1\)
\(=\dfrac{11}{3}\)
a)91-5.(5+x)=61 ;b)[(x+34)-50].2=56;c)1045-[2015-(3x-24)]=5;d)[195-(3x-27)].39=4212;e)30-3(x-2)=18
a,91-5(5+x)=61
=>25+5x=91-61=30
=>5x=30-25=5
=>x=1
b,\([\left(x+34\right)-50]\)x2=56
=>(x+34)-50=56:2=28
=>x+34=28+50=78
=>x=78-34=44.
c,1045-\([2015-\left(3x-24\right)]\)=5
=>2015-(3x-24)=1045-5=1040
=>3x-24=2015-1040=975
=>3x=975+24=999
=>x=999:3=333
d,\([195-\left(3x-27\right)]\)x39=4212
=>195-(3x-27)=4212:39=108
=>3x-27=195-108=87
=>3x=87+27=117
=>x=39
e,30-3(x-2)=18
=>30-3x+6=18
=>30-3x=18-6=12
=>3x=30-12=18
=>x=18:3=6
a) \(...\Rightarrow5\left(5+x\right)=91-61=30\)
\(\Rightarrow\left(5+x\right)=30:5=6\Rightarrow x=6-5=1\)
b) \(...\Rightarrow\left(x+34\right)-50=56:2=28\)
\(\Rightarrow\left(x+34\right)=28+50=78\Rightarrow x=78-34=44\)
c) \(...\Rightarrow2015-\left(3x-24\right)=1045-5=1040\)
\(\Rightarrow\left(3x-24\right)=2015-1040=975\)
\(\Rightarrow3x=975+24=999\Rightarrow x=999:3=333\)
d) \(...\Rightarrow195-\left(3x-27\right)=4212:39=108\)
\(\Rightarrow\left(3x-27\right)=195-108=87\)
\(\Rightarrow3x=87+27=114\Rightarrow x=114:3=38\)
e) \(...\Rightarrow3\left(x-2\right)=30-18=12\Rightarrow x-2=12:3=4\)
\(\Rightarrow x=4+2=6\)
( x - 3 )2 = ( x - 3 )3
10 - { [ ( x : 4 + 15 ) : 10 + 3 . 24 ] :10 } = 5
\(\left(x-3\right)^2=\left(x-3\right)^3\Leftrightarrow\left(x-3\right)^3-\left(x-3\right)^2=0\)
\(\Leftrightarrow\left(x-3\right)^2\left[x-3-1\right]=0\Leftrightarrow\left(x-3\right)^2\left(x-4\right)=0\Leftrightarrow x=3;x=4\)
\(10-\left\{\left[\left(x:4+15\right):10+3.2^4\right]:10\right\}=5\)
\(\Leftrightarrow\left[\left(\dfrac{x}{4}+15\right):10+3.16\right]:10=5\)
\(\Leftrightarrow\left(\dfrac{x}{4}+15\right):10+48=50\Leftrightarrow\left(\dfrac{x}{4}+15\right):10=2\Leftrightarrow\dfrac{x}{4}+15=20\)
\(\Leftrightarrow x=20\)