32.24+32.77.32
=32(24+77.32)
=> 32(24+693)
=> 32. 717
=> 6453
\(3^2.24+3^2.77.3 ^2\)
\(=3^2.\left(24+77.3^2\right)\)
\(=3^2.\left(24+77.9\right)\)
\(=3^2.\left(24+693\right)\)
\(=3^2.717\)
\(=9.717\)
\(=6237\)
32.24+32.77.32
=32(24+77.32)
=> 32(24+693)
=> 32. 717
=> 6453
\(3^2.24+3^2.77.3 ^2\)
\(=3^2.\left(24+77.3^2\right)\)
\(=3^2.\left(24+77.9\right)\)
\(=3^2.\left(24+693\right)\)
\(=3^2.717\)
\(=9.717\)
\(=6237\)
Chứng tỏ rằng:
a) \(3+3^2+3^3+3^4+...+3^{99}⋮13\)
b) \(81^7-27^9-9^{13}⋮45\)
c)\(24^{54}.54^{24}.2^{10}⋮72^{63}\)
25 . 23 - 24 : 23
Tính nhanh
2^x+1 : 4=32
3^x-2:3=243
256:4^x+1=4^2
4^2x-1:4=4^4
5^x-1:5=5^3
3^2x+1:3=3^4
a) 25 - 53 : 52 + 12 : 22
b) 5 [ ( 85 - 35 : 7 ) : 8 + 90 ] - 50
c) 2. [ ( 7 - 33 : 32 ) 22 + 99 ] - 100
d) 27 : 22 + 54 : 53 . 24 - 3 . 25
e) ( 35 . 37 ) : 310 + 5 . 24 - 73 : 7
f) 32 . [ ( 52 - 3 ) : 11 ] - 24 + 2 . 103
g) ( 62007 - 62006 ) : 62006
h) ( 52001 - 52000 ) : 52000
i) ( 72005 + 72004 ) : 72004
j) ( 57 + 75 ) . ( 68 + 86 ) . ( 24 - 42 )
k) ( 57 + 79 ) . ( 54 + 56 ) . ( 33 . 3 - 92 )
l) [ ( 52 . 23) - 72 . 2 ) : 2 ] 6 - 7 . 25
A.24.(13-7)-13.(24-7)
B.5. (-3)^2 . (-1)^3 + (-2020)^0
C.18.(-45)-2.9.5
Bài 1: Tìm x là STN biết:
1/ 5x - 2 - 32 = 24 - ( 68 : 66 - 62)
2/ 3x + 42 = 196 : (193 x 192) - 3.12014
3/ 2x + 2x + 4 = 272
4/ 3 + 2x - 1 = 24 - \([4^2-(2^2-1)]\)
6x-2:12=3
3+2x-1=24-[42-(22-1)
(7x-11)3=25.52+200
Dấu "." là dấu nhân nha
So Sánh 2 số sau
A = 230 + 330 + 4
B = 3 *2410
Tìm x
100-7.(x-5)=31+33
12.(x-1):3=43+23
24+5.x=75:73
5.x-206=24 . 4