1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 830 · 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.Do the 1089 trick with 502: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 258. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 410: 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 2. What is that number?
6. 6.198 + 891 =
7. 7.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.396 + 693 =
9. 9.297 + 792 =
10. 10.Do the 1089 trick with 922: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 771. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 905: 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 3. What is that number?
15. 15.Take 885. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 407. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 442: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 508: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.693 + 396 =
20. 20.Take 953. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 931: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 762: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
24. 24.Do the 1089 trick with 992: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
26. 26.891 + 198 =
27. 27.495 + 594 =
28. 28.Do the 1089 trick with 270: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 158. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 671: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
34. 34.792 + 297 =
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
36. 36.Do the 1089 trick with 831: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 982: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 773. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 815: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 488. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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