1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 992 · 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 920: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 178. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 301: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.891 + 198 =
5. 5.Do the 1089 trick with 963: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
7. 7.396 + 693 =
8. 8.Take 136. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.198 + 891 =
10. 10.Take 452. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
13. 13.Do the 1089 trick with 931: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.792 + 297 =
16. 16.Do the 1089 trick with 823: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 512. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 904. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 210. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 543: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.495 + 594 =
22. 22.Take 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
26. 26.Do the 1089 trick with 450: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 963. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 351. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 651. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 699. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 597: 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 5. What is that number?
33. 33.Do the 1089 trick with 562: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 491: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 368. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.594 + 495 =
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
40. 40.297 + 792 =

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