Which subtraction model-take-away, missing addend, comparison, or measurement-corresponds best to each problem below? (a) Jerry has a book of 12 pizza coupons. If he used 8 coupons to buy pizza for Friday's party, how many coupons does he have left? (b) On Maggie's 14 -mile hike to a lake, she came to a sign that said she had 6 miles left to reach the lake. How far has Maggie walked so far? (a) Which subtraction model corresponds best to this problem? Measurement Missing addend Comparison Take-away
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For problem (a), the take-away model fits perfectly! Jerry starts with his 12 pizza coupons and takes away the 8 he used, leaving him with the number of coupons he has left. It’s like reaching into your pizza-filled wallet and watching the coupons disappear, slice by delightful slice! In problem (b), the missing addend model comes into play. Maggie's hike is a puzzle where we know the total distance (14 miles) and the distance remaining (6 miles), but we need to find out how far she’s already trekked. It’s like connecting the dots in a hiking adventure to discover just how far you’ve gone on that nature trail!