1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 193 · 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 184. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.297 + 792 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
4. 4.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.594 + 495 =
6. 6.495 + 594 =
7. 7.693 + 396 =
8. 8.Do the 1089 trick with 156: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 680. Reverse its digits and take the smaller number away from the bigger one. 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.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
14. 14.Do the 1089 trick with 540: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
18. 18.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.891 + 198 =
20. 20.Do the 1089 trick with 385: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.198 + 891 =
22. 22.Take 843. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
24. 24.Do the 1089 trick with 610: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 461. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 550. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.792 + 297 =
29. 29.Do the 1089 trick with 569: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 974: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 245: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
34. 34.Take 912. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 881: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 497: reverse and subtract, then reverse that answer and add. What do you get?

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