1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 452 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
2. 2.Do the 1089 trick with 833: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 176: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
7. 7.Take 744. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 702: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 440: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 997. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 900. 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 1. What is that number?
13. 13.Do the 1089 trick with 691: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 220. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 592: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 117: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.495 + 594 =
18. 18.Take 681. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 702. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 723. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.396 + 693 =
23. 23.198 + 891 =
24. 24.Take 917. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 974. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
29. 29.Take 396. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
31. 31.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 411. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 944. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.693 + 396 =
38. 38.Do the 1089 trick with 174: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
40. 40.891 + 198 =

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