1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 275 · 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. 1.297 + 792 =
2. 2.396 + 693 =
3. 3.891 + 198 =
4. 4.Take 402. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
6. 6.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
8. 8.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
10. 10.Take 376. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 330. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.792 + 297 =
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
15. 15.Do the 1089 trick with 500: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 995. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.693 + 396 =
18. 18.Take 500. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 340: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.594 + 495 =
22. 22.Do the 1089 trick with 862: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 328: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
26. 26.495 + 594 =
27. 27.Take 719. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 644. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 139: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
31. 31.Do the 1089 trick with 642: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 315. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.198 + 891 =
34. 34.Do the 1089 trick with 715: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 711: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 589. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 991. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 248: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 754: reverse and subtract, then reverse that answer and add. What do you get?

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