Final answer:
The number sentence that matches the word problem is 5 + 4 = 9.
Step-by-step explanation:
To find the total number of pints that Wade and Matt picked altogether, we need to add the number of pints each of them picked. Wade picked 5 pints and Matt picked 4 pints, so the number sentence that matches the word problem is 5 + 4 = 9.
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