Lisa bought 8 pencils in one week. She then bought 7 more pencils. How many pencils will Lisa have altogether and what operation did you use to find the answer ?
Andy had 23 marbles. He lost 12 marbles. How many marbles are left with him and which operation did you use to find the answer ?
Matt has 80 drones and Alex has 23 drones; how many drones do they have altogether and which operation did you use to find the answer ?
Max has 23 pens, his friend gave him 22 more pens . The next day Max gave 14 pens to his sis. How many pens does Max have now and which operation did you use to find the answer ?
Ram had scored 234 points in a video game and lost 134 points; how many points does he have now and which operation did you use to find the answer ?