Fourth Grade Challenging Math ------------------------------------------------------------------------------ 4-9) Answers a) 730 b) 78
4-9) Answers
a) 531 + 199 = 530 + 1 + 199 = 530 + 200 = 730 b) 3 + 7 + 11 + 15 + 19 + 23
= (3 + 7) + (11 + 19) + 15 + 23 = 10 + 30 + 15 + 23 = 78
