1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 379 · 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.Do the 1089 trick with 217: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.693 + 396 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
4. 4.594 + 495 =
5. 5.792 + 297 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
7. 7.Take 619. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 510: 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 4. What is that number?
10. 10.Take 338. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 891: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 305: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 407: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.891 + 198 =
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
17. 17.Do the 1089 trick with 942: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 674. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 862. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 886. Reverse its digits and take the smaller number away from the bigger one. 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 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 530: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.297 + 792 =
26. 26.198 + 891 =
27. 27.Take 921. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.495 + 594 =
29. 29.396 + 693 =
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 388: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 901: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 912. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 590. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 972: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 357: reverse and subtract, then reverse that answer and add. What do you get?

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