- 97 - 15 + 44 - 35 - 12 + 98 = - 17
-97-15 + 44-35 - 12 + 98
= -112 + 9 - 110
= - 121 - 110
= - 231.
~ o0o HAPPY NEW YEAR o0o ~.
- 97 - 15 + 44 - 35 - 12 + 98 = - 17
-97-15 + 44-35 - 12 + 98
= -112 + 9 - 110
= - 121 - 110
= - 231.
~ o0o HAPPY NEW YEAR o0o ~.
tính tổng
-97-15+44-35-12+98
888 - ( -333 ) - 222 + 70
-97 - 15 +44 - 35 -12 + 56
tính nhanh
2+4+6+...+98+100
100-96+92-88+84-80+...+12-8-4
150-100+149-97+148-94+...+118-4
225-100-221-96+217-92+...+129-4+5
31+33+35+...+113+115
111-98+113-96+115-94+...+207-2
tính nhanh
(-43)+44 +(-45) +46 +....+(-97)+98+(-99)
Tính nhanh
1-2-3-4+5-6-7-8+9-10-11-12+13-14-15-16+.........+97-98
Tính nhanh
1)35-7.(5-18)
2)5+9+13+17+21-7-11-15-19-23
3)100+98+96+...+4+2-97-95-....-3-1
Tính giá trị biểu thức:
A = 1-3+5-7+9-11+13-15+...+97-99+101
B=1-2-3-4+5-6-7-8+9-10-11-12+...+97-98-99-100
B2: Tính tổng
A=24+25+26+...+122 C=100-99+98-97+96-95+...+2-1
B=12+15+18+21+...+1995 D=1+3+5+7+...+2021