1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 490 · 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 941: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
4. 4.594 + 495 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
6. 6.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 147. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.891 + 198 =
9. 9.Do the 1089 trick with 753: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 784. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 248: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
15. 15.Take 991. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 193. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
20. 20.Take 240. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
22. 22.Take 508. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 156. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 286: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 257: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 245. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.693 + 396 =
28. 28.Take 277. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.495 + 594 =
30. 30.Take 416. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
32. 32.Take 986. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.297 + 792 =
34. 34.Do the 1089 trick with 230: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
37. 37.Take 113. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 642. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 973. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 450: reverse and subtract, then reverse that answer and add. What do you get?

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