100+200+300+...+1000=(1000+100)X10/2=5500
AI K MINHH MINH K LAI NGUO DO
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100+200+300+...+1000=(1000+100)X10/2=5500
AI K MINHH MINH K LAI NGUO DO
x+1000=300-200+100
ai k mk
x+100=200+300
x-100=200
ai k mk
x + 100 + 200 = 1000
Ai k mình thì mình k lại
x+200=700-4000-100
ai k mk rui mk k lai
mot chiec xe o to cu di 100 km thi het 15 l xang . H oi o to do di 240 km thi het bao nhieu l xang ?
ai nhanh thi nhan 3 cai k cua minh !!!!!!!!!!!!!!!
ai co nhu cau k cho minh roi minh se k lai
11+2345=?
ai k minh minh k lai
x+300=400-300
ai k mk rui mk k lai
a+ b = ............. ?
ai k minh , minh k lai
10 x 10 = ....?
ai k minh roi minh k lai
ok