1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 446 · 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. 1.594 + 495 =
2. 2.Take 134. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
5. 5.Take 125. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 931: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 410: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 920. 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 5. What is that number?
10. 10.Do the 1089 trick with 815: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.792 + 297 =
12. 12.Do the 1089 trick with 294: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 842. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 542: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
18. 18.198 + 891 =
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
20. 20.495 + 594 =
21. 21.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 418. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
24. 24.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 510. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 981. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 260: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.396 + 693 =
31. 31.Take 840. Reverse its digits and take the smaller number away from the bigger one. 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.Do the 1089 trick with 562: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.297 + 792 =
35. 35.Take 577. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 621: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.693 + 396 =
40. 40.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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