Josh had 37 marbles in his collection. He lost 5 marbles and found 36 new ones. How many marbles does he have now?
Josh had 37 marbles. 
He lost 5 marbles. 
That means he now has 37 - 5 = 32 marbles. 
He found 36 new marbles. 
That means he now has 32 + 36 = 68 marbles.