There are 24 birds on a tree. 7 birds fly away. How many birds are left on the tree?
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Worked Solution
Step 1: 'Fly away' means we subtract. So 24 − 7.
Step 2: 4 ones cannot easily give 7, so borrow 1 ten: 24 becomes 1 ten and 14 ones.
Step 3: 14 − 7 = 7 ones, and 1 ten left. So the answer is 17.
Answer: 17
Correct answer: 17
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