1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 420 · 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.Take 936. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.297 + 792 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
6. 6.Do the 1089 trick with 863: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.891 + 198 =
8. 8.Do the 1089 trick with 280: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 991: 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 7. What is that number?
11. 11.Take 457. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.693 + 396 =
13. 13.Do the 1089 trick with 225: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 740: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 583. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 691: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 396. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 771. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
23. 23.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 486: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 401. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 926. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 366: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
29. 29.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
31. 31.198 + 891 =
32. 32.495 + 594 =
33. 33.Take 577. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 705: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 984: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 803. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
39. 39.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 158. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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