1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 923 · 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 990: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
4. 4.Take 754. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.693 + 396 =
6. 6.891 + 198 =
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
8. 8.Do the 1089 trick with 621: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 811. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 390. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 876. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.594 + 495 =
13. 13.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 821. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.297 + 792 =
16. 16.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
18. 18.Take 279. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 267: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 501: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 926. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 991. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 981. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.495 + 594 =
26. 26.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 365. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 187. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 431: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 105. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 582: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 659: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 722: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 129: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
36. 36.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
38. 38.Take 340. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 965. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 841. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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