Justin drank 1 liter of water during soccer practice. he drank 2000 milliliters of water during the soccer game. how many milliliters of water did he drink during the practice and the game?

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?

Which number line correctly shows 0.8 + 0.3?

How many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.) how many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.)