1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 209 · 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 380. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.495 + 594 =
3. 3.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 873: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 893: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.693 + 396 =
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
9. 9.Take 991. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.297 + 792 =
12. 12.Take 723. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 194: 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 7. What is that number?
15. 15.Take 638. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 963: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 310: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 674: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 389: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 167. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 884. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
27. 27.Do the 1089 trick with 144: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.198 + 891 =
29. 29.891 + 198 =
30. 30.Do the 1089 trick with 360: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 319. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.396 + 693 =
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
34. 34.792 + 297 =
35. 35.Take 147. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 913: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 169: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 619. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.594 + 495 =

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