How to do the first question on page 107 of Unit 8 in the first volume of the fourth grade math book?
64。 It takes mom and dad 12 minutes to drive from home to the store. Mom works separately. Mom walked back to the wreath in 30 minutes+12=42. Dad also takes 2 minutes+15 minutes+10+ 15=42 minutes to take the materials back to the wreath and meet her. Then it will take 65432 minutes.
12+42+ 10=64 minutes.