10 . 2 + 10 . 3=?
4 . 3 + 2 . 4=?
100+200+300+400+500+600+700+800+900=?
123,45 + 23,56 + 76,44 + 54,55=?
237 + 2 456 + 1 763 + 544
How many of the first 500 positive integers are multiples of all three integers 3, 4 and 5?
TínhA=2^2.2^3.2^4.2^5
\(\dfrac{1}{2}\)+\(\dfrac{2}{3}\)+\(\dfrac{3}{4}\)+\(\dfrac{1}{3}\)=?
ƯCLN (10,20,30)
X-10+2=20+10