1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 896 · 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 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.891 + 198 =
4. 4.Take 331. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
9. 9.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
11. 11.693 + 396 =
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
13. 13.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 264. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.297 + 792 =
16. 16.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 148. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.396 + 693 =
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. 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.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 861: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.594 + 495 =
24. 24.Do the 1089 trick with 966: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 812: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 843: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.198 + 891 =
28. 28.Do the 1089 trick with 550: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 789: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 309. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 410: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.792 + 297 =
36. 36.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 270. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 741. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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