Các câu hỏi tương tự
tính nhanh tổng sau : A = -100 -99 -98 - 97 -...+ ...+ 99 + 100 + 101 + 102
Tính
(2^100+2^101+2^102) : (2^97+2^98+2^99)
2^100+2^101+2^102
2^97+2^98+2^99
1 + 2 + 3 - 4 - 5 - 6 + 7 + 8 +9 - 10 - 11- 12 +..... + 97 + 98 + 99 - 100 - 101 - 102
1+2+3-4-5-6+7+8+9-10-11-12+.........+97+98+99-100-101-102
1+2+3-4-5-6+7+8+9-10-11-12+...+97+98+99-100-101-102
Tính nhanh:
A=102+100+98+96+94+...+2-99-97-95-...-1.
B= 1 + 2+3+4+...+2022 + 2023
C= 2 + 4 + 6+...+ 98 + 100
D= 1 + 3 + 5 +...+ 97 + 99
E= 10 + 14 + 18 +... + 98 + 102
D= 1+2+3-4-5-6+7+8+9-10-11-12+........+97+98+99-100-101-102