[(516+416).317.310)].(24-42)
=[(516+416).317.310)].(16-16)
=[(516+416).317.310)].0
=0
Giải :
[( 516 + 416 ) . 317. 310 )] . ( 24- 42 )
= [( 516 + 416 ) . 317. 310 )] . [ 24 - ( 22 )2]
= [( 516 + 416 ) . 317. 310 )] . [ 24 - 24)
= [( 516 + 416 ) . 317. 310 )].0
= 0
(5^16+16^5)(3^17-3^10)(2^4-4^2)
\(\left(5^{16}+16^5\right)\left(3^{17}-3^{10}\right)\left(2^4-4^2\right)\)
tính nhanh.
Tính (nhanh nếu có thể)
[(5^16+4^16).3^17-3^10].(2^4-4^2)
1) -145.(13 - 57) + 57.(10 -145)
2) 17.(15 - 16) + 16.( 17- 20)
3) -38.(25 - 4) + 25.(-4 + 38 )
4) 23.(145 - 17) - 145.(23 - 6)
5) 24.(15 - 4) + 4.(24 - 15)
6) 199.(15 - 17) - 199.(-17 + 5)
7) -39.(5 - 99) + 99.(10 - 39)
Tính hợp lí
1) -145.(13 - 57) + 57.(10 -145)
2) 17.(15 - 16) + 16.( 17- 20)
3) -38.(25 - 4) + 25.(-4 + 38 )
4) 23.(145 - 17) - 145.(23 - 6)
5) 24.(15 - 4) + 4.(24 - 15)
6) 199.(15 - 17) - 199.(-17 + 5)
7) -39.(5 - 99) + 99.(10 - 39)
Tìm số nguyên x, biết:
1) -16 + 23 + x = - 16
2) 2x – 35 = 15
3) 3x + 17 = 12
4) (2x – 5) + 17 = 6
5) 10 – 2(4 – 3x) = -4
6) - 12 + 3(-x + 7) = -18
a ) 3^6 : 3^4 + 2^2x(12-3^3) - 2^0
b) 5^3 x 52 + 5^3 x7 - 5^3
c) 5^3 + ( 4 + 3^4) x2 + (3^3 - 3 ) : 4
d) (2x25x7 - 21x15) : 7
e) 5 x [(92+ 2^5 : 2^2 ) : 5^2 + 2^4 ] - 7^2
f ) ( 5^16 + 4^16) x 3^17 - 3^10 ) x ( 2^4 - 4^2 )
Thực hiện phép tính :
a) 13 . 3^3 + 17 . 3^3
b) 76 - [ 26 + ( 16 - 2 . 7 ) ^3 ]
c) 3^2 . 7 - ( 1^10 + 24 ) : 5^2
d) 6 . 3^2 - 16 : 2^2
e) 4^2 . 17 - 4^2 . 11
h) 100 - [ 116 - ( 13 - 5 ) ^2 ]
g) 5^3 + ( 3^4 + 4 ) : 2 + ( 27 - 3 ) : 4
--- Giải nhanh hộ '-' Cảm ơn. ---
Tính hợp lí
a, 387 . 2694 + 7305 . 387 + 387
b, ( 5^16 + 16^5 ) ( 3^17 - 3^10 ) ( 2^4 - 4^2 )
c, ( 5^2007 - 5^2006 ) : ( 5^2005 . 5 )