1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 989 · 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 900: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 741: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 883. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 579. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.495 + 594 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
7. 7.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.891 + 198 =
9. 9.297 + 792 =
10. 10.Take 723. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
13. 13.Take 115. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 608: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 907. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.693 + 396 =
18. 18.Take 924. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
22. 22.Take 275. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 337. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 174: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.198 + 891 =
27. 27.Take 992. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 390: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 992: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 701. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 416: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 886: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 345: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 553: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 519. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 129: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 816: reverse and subtract, then reverse that answer and add. What do you get?

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