use number sense Duane and Mick are saving their money to build a tree house.Duane adds $5. ti their piggy bank every other week Mick adds $2.every week.So far they have saved $45.How many weeks have they been saving money?
Duane and Mick have been saving money for 10 weeks.
Work
W1 5+2=7 W2 0+2=2 W3 5+2=7 W4 0+2= 2 Total so far is 18 W5 5+2 = 7 W6 0+2 = 2 W7 5+2 = 7 W8 0+2 = 2 Total now is 36 W9 5+2 = 7 W10 0+2 = 2 You end at 45!
