Nori had 4 boxes of crayons with 8 crayons in each box. She gave 5 crayons to Mae and also give some crayons to Lea. How many more crayons did she give to Lea than Mae if she has only 15 crayons left?
From the 4 boxes, Nori had 8 * 4 = <T>multiply(8, 4)=32 crayons
After giving 5 crayons to Mae, she had 32 - 5 = <T>subtract(32, 5)=27 crayons left.
If she only has 15 crayons now, this means she gave Lea 27 - 15 = <T>subtract(27, 15)=12 crayons.
Hence, Lea has 12 - 5 = <T>subtract(12, 5)=7 more crayons than Mae.
