1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 737 · 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. 1.396 + 693 =
2. 2.Take 941. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 290: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.693 + 396 =
5. 5.Take 623. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
7. 7.495 + 594 =
8. 8.Take 932. 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 2. What is that number?
10. 10.Do the 1089 trick with 781: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 681. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 119: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 205. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 671. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.594 + 495 =
17. 17.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 632. 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 1. What is that number?
20. 20.Do the 1089 trick with 941: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.792 + 297 =
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
23. 23.Take 702. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 864: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 270. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 187. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
29. 29.198 + 891 =
30. 30.297 + 792 =
31. 31.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 630: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 953. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 740: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
36. 36.Do the 1089 trick with 406: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 640: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 330: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 335. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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