Calculated:  200 + 300

in our garege there are 4 bicycles,2 tricycles and one quad bike.how many wheels are there altogether?

2 + 3 + ....+ 9 = ???

3000 +4000 + 2000 = ????

ko làm được

1 + 100 + 200 + 500 + 700 + 900 + 1000 = ???

ai nhanh tick tick