1) (5¹⁹⁸⁶-5¹⁹⁸⁵) : 5¹⁹⁸⁵
2) (7⁸⁴⁶+7⁸⁴⁷) : 7⁸⁴⁶
3) (9²⁰¹⁸-3⁴⁰³⁶) : 6²⁰⁰⁶
4) (7⁸⁰.8⁷⁰-56⁷⁰) : 56⁷⁰
5) 4⁴⁰¹⁶:(4⁴⁰¹⁷-4⁴⁰¹⁶)
6) (12²⁰⁶.2²⁰⁷-24²⁰⁶) :24²⁰⁶
7) (5²-24)⁸⁹⁴⁶+4³⁰:2⁶⁰
8) (37.8¹⁰⁰⁷-7.2³⁰²¹) :8¹⁰⁰⁷
-Mình cần gấp ạ
5) 6x – 5 = 3 + 4x 6) x – (17 – x) = x – 7
7) 9 – 25 = (7 – x) – ( 25 + 7) 8) 10 – 2.(4 – 3x) = - 4
9) (-12)2
.x = 56 + 10. 13x 10) 2x2
– 1 = 49
1) 1/1×2 + 2/2×4 + 3/4×7 + 4/7×11 +...+ 8/29×37 + 9/37×46 + 10/46×56
2) 4/3×7 + 4/7×11 + 4/11×15 + 4/15×19 + 4/19×23 + 4/23×27
3) 4/3×6 + 4/6×9 + 4/9×12 + 4/12×15 + ... + 4/99×102
a 12 – 34 b 23 – 47 c 31 – 23 d 9 – 5 e 4 – 15 25 f 23 13 17 57 g 4 . 9 6 . 12 – 7 h 14 6 19 14 19 i 56 – 8. 27 7 j 8 5 . 2 – 3 6 k 4 . 3 125 . 25 8 l 9 6 . 3 – 4 7 m 45. 18 – 15 – 18. 45 – 15
tìm x : -7/8.8/9=112/x
a) 92/9 + 13/5 - 56/9
b) 58/7 - (31/9 + 30/7)
c) 2/3 + 1/3 x 9/4 - 13/12
d) 41/8 - 7/4 : 11/5
e) 478/19 : 5/4 - 668/19 : 5/4
f) 32/21 x 49/45 : 16/22 x 15/33
g) 2020x2018+9 / 2019x2020-2011.
Giup minh voi minh dang can gap!!!
1) so sánh phân số
a) -8/12 và -3/-4 b)-56 /24 và 7/3 c) -4/25 và 15/-13
2) tính
a) 3/5 x 20/ -9
b)4/15 + -3/2 +8/-5
c) 19/35 x -38/7
d) -7/12 x 13/14 +1/14 x (-7) /12
4)(3 1/2 + 2x) : 3/14 = 7/12
5)1/4 + 1/3 : (3x) = -5
6)2 7/9 - 3/4 (x+1) = 7/9
A=1/ 6.10+1/ 7.9+1/ 8.8+1/ 9.7+1/ 10.6
Chứng minh rằng: A=1/8. (1/6+1/7+1/8+1/9+1/10)