73.25+28.25-25=25(73+28-1)=25.100=2500
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Thực hiện phép tính :
a, 249 - 25 × 8 + 32×4
b,27:{ 480 : [(513: 9 + 19 ) + 84 ]}
c. 73 × 25 + 28 × 25 - 25
d. 2× 9 ×50 - 890
10) x - [42 + (-28)] = -8
11) (7 - x) - (25 + 7)=- 25
12) (3x - 24). 73 = 2.74
13) ( x – 4)² = 25
14) 24( 2x + 11)² = 42
15) 73x-2 – 3.73 =73 . 4
Tìm x
a. 126 - 2x = 12 - ( -28 )
b. 25 - 5 ( x+1) = 30 - 125
cc. | 3x - 1| - 25 = 73
d . 2( x+ 2 ) - 6 = 120 - 4x
Bài 1 : Bỏ ngoặc rồi tính hợp lí
| 25 - 24 - 10 | - (28 - 30 + 4 )
- ( - 73 ) + ( 44 - 94 + 27 ) + 94
(- 33 + 108 - 75 ) - ( 108 + 25 )
120 - ( - 2 + 120 - 18 ) - 92
25^28+25^24+25^20+...+25^4+1/25^30+25^28+25^26+...+25^2+1
Tính
\(A=\frac{25^{28}+25^{24}+25^{20}+...+25^4+1}{25^{30}+25^{28}+25^{26}+...+25^2+1}\)
\(C=\frac{25^{28}+25^{24}+...+25^4+25^0}{25^{30}+25^{28}+...+25^2+25^0}\)= ?
\(A=\frac{25^{28}+25^{24}+25^{20}+...+25^4+1}{25^{30}+25^{28}+25^{26}+...+25^2+1}\)
\(C=\frac{25^{28}+25^{24}+...+25^4+25^0}{25^{30}+25^{28}+...+25^2+25^0}\)= ?