1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 787 · 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. 1.891 + 198 =
2. 2.Do the 1089 trick with 164: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 892: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 572: 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 6. What is that number?
6. 6.Take 993. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
8. 8.198 + 891 =
9. 9.Take 570. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 952. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 644. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 429: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.495 + 594 =
16. 16.Take 913. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
19. 19.Do the 1089 trick with 680: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 614: 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 3. What is that number?
22. 22.396 + 693 =
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
24. 24.594 + 495 =
25. 25.Take 931. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 855. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.693 + 396 =
28. 28.Take 934. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 907. 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.Take 467. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 650. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 603. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
35. 35.Take 411. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 883. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 239. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 701: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 812. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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