Harder subtraction and strategies
"Tricky take-aways and clever shortcuts," says Biscuit. "Explain how you got there."
1. Subtract: a) 5 003 − 1 678 = b) 8 200 − 3 645 =
2. Find the missing number: □ − 1 250 = 2 750.
3. The friends had 4 200 gumnuts. They gave 1 850 to the birds and 980 to the wallabies. How many are left? Show both steps.
4. Mae says 600 − 298 is easy: take 300, add 2 back. Use her trick for 700 − 397 and explain.
5. Make the largest possible difference using 8, 5, 2, 1 to fill □□ − □□. Show your numbers.