Work through the levels in order. Type your answer and press Check — open the worked solution if you get stuck. Answers like -6, 3/4 or 0.25 are typed exactly as shown. A ⭐ Bonus Challenge at the end is extra credit — skip it if the rest was hard work.
Level 1 · Warm-up
1 What is four thousands more than 31520?
Show worked solution
31520 + 4000 = 35520.
2 In 68493, what is the 8 worth?
Show worked solution
The 8 sits in the thousands → 8000.
3 Round 3471 to the nearest 100.
Show worked solution
Next digit is 7 → round up: 3500.
Level 2 · Core
4 What is five hundreds less than 20341?
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20341 − 500 = 19841 — the thousands roll back.
5 Cards 6, 1, 8: difference between largest and smallest 3-digit numbers?
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861 − 168 = 693.
6 Rounded to the nearest 10, how far does 65 move?
Show worked solution
65 → 70 (halfway rounds UP) → moves 5.
Level 3 · Challenge
7 Cards 7, 0, 2, 5: build the SMALLEST 4-digit number.
Show worked solution
No leading zero: 2 first, then 0, 5, 7 → 2057.
8 A number rounds to 80 (nearest 10). What is the smallest it could be?
Show worked solution
75 to 84 all round to 80 → smallest is 75.
9 What number is three thousands more than 98470?
Show worked solution
98470 + 3000 = 101,470 — across the 100,000 barrier!