1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 870 · 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 931. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
3. 3.Take 481. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 487. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.693 + 396 =
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
8. 8.Do the 1089 trick with 528: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.495 + 594 =
10. 10.Do the 1089 trick with 460: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 874: 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 2. What is that number?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
16. 16.198 + 891 =
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
18. 18.792 + 297 =
19. 19.297 + 792 =
20. 20.Do the 1089 trick with 301: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
22. 22.Take 612. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
26. 26.Do the 1089 trick with 229: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 179: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 276: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 680: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 961. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 408: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.891 + 198 =
38. 38.Take 703. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 557. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.396 + 693 =

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