\(\dfrac{5}{6}+\left(\dfrac{5}{9}-\dfrac{1}{4}\right)=\dfrac{5}{6}+\left(\dfrac{20}{36}-\dfrac{9}{36}\right)=\dfrac{5}{6}+\dfrac{11}{36}=\dfrac{41}{36}\)
\(\dfrac{5}{6}+\left(\dfrac{5}{9}-\dfrac{1}{4}\right)=\dfrac{5}{6}+\left(\dfrac{20}{36}-\dfrac{9}{36}\right)=\dfrac{5}{6}+\dfrac{11}{36}=\dfrac{41}{36}\)
Tính bằng cách thuận tiên nhất
A) 1/5+ 5/9+ 4/5+ 1/9 + 3/9
B) 1/3 + 1/6+4/3+2/6+2/3+5/6
1+2+3+4+5+6+7+8+9+1+2+3+4+5+6+7+8+9+1+2+3+4+5+6+7+8+9=?
a. 1/5 x 1/2 : 3/10 =
b. 2/3 : 6/5 : 2/9 =
c. 6/4 : 1/4 - 8/5 =
d. 0 : 4/5 x 6/9 =
1+1+2+3+4+5+5+6+7+8+9+9+9+7+5+5+6+9+9+9+9
1+1+1+2+2+2+3+3+3+4+4+4+5+5+5+6+6+6+7+7+7+8+8+8+9+9+9+.......+n
Tìm n
Tính bằng cách thuận tiện:
A)2/9+3/9+4/9+5/9+6/9+7/9
B)1/6+4/9+5/6+11/16+5/9+5/16
1+1+1+1+1+2+3+4+5+6+7+8+9+10 x 1+1+1+1+1+2+3+4+5+6+7+8+9+10 +1+1+1+1+1+2+3+4+5+6+7+8+9+10 - 10 x 9 - 9 + 45 +46 +47 =
3/4 : 5/4 + 1/4 : 5/6
5/6 : 8/9 - 3/4 : 8/9