Các câu hỏi tương tự
(2+4+6+...+100) - (1+3+5+...+99) = ?
1 x 2 + 2 x 3 + 3 x 4 + ... + 99 x 100 = ?
3 x 4 + 4 x 5 + 5 x 6 + ... + 149 x 150 = ?
1 + (1 + 2) + ( 1 + 2 + 3) + (1 + 2 + 3 + 4) + ....... + (1 + 2 + 3 + ... + 99)
----------------------------------------------------------------------------------------------------------- ( gạch ngang phân số )
1 x 99 + 2.98 + 3.97 + ...... + 99 x 1
tính nhanh (2/3+3/4+5/6+...+99/100).(1/2+2/3+3/4+...+98/99)-(1/2+1/3+...+99/100).(2/3+2/4+...+98/99)
Tính A:B
a)A=98+1/2+1/3+1/4+...+1/99
B=2/3+4/3+5/4+...+100/99
b)A=2018+1/2+1/3+1/4+...+1/2019
B=3/2+4/3+3/4+...+2020/2019
c)A=99/1+98/2+97/3+...+2/98+1/99
B=1/2+1/3+1/4+...+1/100
Giải đầy đủ
1+1+2+2+2+3+3+3+4+4+4+5+5+5+6+6+6+7+7+...+99+99+100
đúng sai
2 3/5*3 13 = 8 2/3
5 1/6*3=5 1/2
4 1/383 1/4=1/3
6:2 2/3=99/4
1/1*2+1/2*3+1/3*4+1/4*5+...+1/99*100
1/2:3+1/3:4+1/4:5+...+1/98:99+1/99:100
Tính nhanh
1+ 1/4+1/8+1/16
2-1/8-1/12-1/16
4/99*18/5:12/11+3/5
(1-3/4)*(1+1/3):(1-1/3)
1.A=(2/3+3/4+4/5+................+99/100)*(1/2+2/3+..............+98/99);B=(1/2+2/3+..............+99/100)*(2/3+3//4+...................+98/99)
Tính A và B bằng cách thuận tiện nhất.
2.Cho a=2008/2009;b=2009/2008;c=1/2009;d=2007/2008
Tính a-b+c+d
3.Tìm STN m biết:
2016+m/m+2520+m/m+3024+m/m