1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 751 · 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. 1.792 + 297 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
4. 4.594 + 495 =
5. 5.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 861: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 851: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 346. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 860: 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
12. 12.297 + 792 =
13. 13.198 + 891 =
14. 14.396 + 693 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
16. 16.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 199. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 591. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
20. 20.Do the 1089 trick with 754: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 412: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.891 + 198 =
24. 24.Take 371. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 106: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 904: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 802: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.495 + 594 =
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
32. 32.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 411: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 137: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 792. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 691: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.693 + 396 =
40. 40.Take 832. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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