1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 364 · 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 946. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
4. 4.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 792: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 841: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
8. 8.Do the 1089 trick with 278: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 137: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 855: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
12. 12.891 + 198 =
13. 13.Take 189. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 963: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.396 + 693 =
17. 17.Take 452. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 538: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 407: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 215: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 471. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 244. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.792 + 297 =
25. 25.Take 568. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
27. 27.Take 932. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 316: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.693 + 396 =
30. 30.Take 672. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.198 + 891 =
32. 32.Take 863. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 165: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 402. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 983. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
40. 40.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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