1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 919 · 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 461. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.594 + 495 =
3. 3.297 + 792 =
4. 4.198 + 891 =
5. 5.Do the 1089 trick with 319: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 467. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 421. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 941. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.495 + 594 =
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
11. 11.Take 995. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
13. 13.Take 714. Reverse its digits and take the smaller number away from the bigger one. 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 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 668: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 502: 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 1. What is that number?
19. 19.Take 311. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 419. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 905: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 500: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.891 + 198 =
25. 25.Take 478. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 109. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 318: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 961: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 220: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 991. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 940. Reverse its digits and take the smaller number away from the bigger one. 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 7. What is that number?
34. 34.Do the 1089 trick with 240: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.792 + 297 =
36. 36.Do the 1089 trick with 785: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 173. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 680: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 936. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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