\(\dfrac{11}{6}-\dfrac{16}{11}=\dfrac{121}{66}-\dfrac{96}{66}=\dfrac{25}{66}\)
\(\dfrac{11}{6}-\dfrac{16}{11}=\dfrac{121}{66}-\dfrac{96}{66}=\dfrac{25}{66}\)
5/11+1/2+2/5+6/11+3/4+16/25+5/16=?
5/11+1/2+2/5+6/11+3/4+16/25+5/16
Tính nhanh tổng các số sau:
A=1/1*6+1/6*11+1/11*16+1/16*21+........+1/31*36
tinh nhanh 1/1*6+1/6*11+1/11*16+...+1/491*496+1/496*501
Tính bằng cách hợp lý:
a) (44*52*60) : (11*13*15)
b) (16*17-5) : (16*16+11)
c) (27*700-24*45*20) : (45-40+35-30+25-20+15-10+5)
d) 1+6+11+16+...+46+51
Tính nhanh
3/5+6/11+7/11+2/5+16/11+19/13
Cần gấp
C = 1/1x6 + 1/6 x 11 + 1/11 x 16 + ....... + 1/2011 x 2016
38/11 + ( 16/13 + 6/11 )
3/4 : 3/5 - 1/5
tính bằng cách hợp lí nhất
Câu 5 (3,0 điểm).
a) Tính: 85 * 16 + 16 * 15
b) Tinh: (3/7 * 11/15 + 3/7 * 4/15) / (4 + 2 6/11 - 6/11)
c) Tìm x, biết: x + (x + 3) + (x + 6) +...+(x+102)=1855