1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 358 · 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.Take 331. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.198 + 891 =
4. 4.Do the 1089 trick with 451: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.792 + 297 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
8. 8.Take 329. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
10. 10.Do the 1089 trick with 981: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 587. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
14. 14.Do the 1089 trick with 982: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 501. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.693 + 396 =
19. 19.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.297 + 792 =
22. 22.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 220: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.396 + 693 =
25. 25.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 183. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 856. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
30. 30.891 + 198 =
31. 31.Take 214. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 934: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 379: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 482. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 306: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 841: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.594 + 495 =
39. 39.Do the 1089 trick with 952: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?

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