1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 120 · 40 questions

The trick (Reverse and subtract): Reverse the number and take the smaller number away from the bigger one. The answer is always one of 198, 297, 396, 495, 594, 693, 792, 891: middle digit 9, first and last digits adding to 9. Reverse that answer and add: you always get 1089.

1. 1.297 + 792 =
2. 2.495 + 594 =
3. 3.Do the 1089 trick with 974: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
5. 5.Do the 1089 trick with 609: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 377. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.396 + 693 =
8. 8.Take 941. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.891 + 198 =
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
13. 13.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
15. 15.693 + 396 =
16. 16.Take 300. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
18. 18.Do the 1089 trick with 426: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 922. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 470: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.594 + 495 =
22. 22.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.792 + 297 =
24. 24.Take 199. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 301. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.198 + 891 =
28. 28.Do the 1089 trick with 166: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 806: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 593. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 856. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 146: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
35. 35.Take 280. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 218: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 508: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
39. 39.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?

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