1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 639 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
4. 4.Do the 1089 trick with 449: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 128: 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 2. What is that number?
8. 8.Do the 1089 trick with 883: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 623: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 209. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.495 + 594 =
12. 12.Take 815. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.198 + 891 =
15. 15.396 + 693 =
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
17. 17.792 + 297 =
18. 18.297 + 792 =
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
20. 20.Take 874. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 951. 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 4. What is that number?
24. 24.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 196. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 359: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 951: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 460: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 138: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
34. 34.693 + 396 =
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
36. 36.Take 831. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 359. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 628. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 329. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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