1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 786 · 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 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 136. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 367: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
5. 5.396 + 693 =
6. 6.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.495 + 594 =
8. 8.Do the 1089 trick with 480: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 883: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.594 + 495 =
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
13. 13.Do the 1089 trick with 789: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 306. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 650: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 497: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 690: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.891 + 198 =
21. 21.297 + 792 =
22. 22.Do the 1089 trick with 288: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 966: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 290. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 319: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
29. 29.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 458. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 145: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
37. 37.693 + 396 =
38. 38.Take 761. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 803. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 649. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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