1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 914 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
2. 2.Do the 1089 trick with 592: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.297 + 792 =
4. 4.Take 449. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
7. 7.693 + 396 =
8. 8.Take 369. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.891 + 198 =
10. 10.Do the 1089 trick with 169: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.495 + 594 =
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
13. 13.Do the 1089 trick with 994: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 376. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 806: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
17. 17.Do the 1089 trick with 108: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 997. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 450. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 559. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 390: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 893. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 815: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.396 + 693 =
28. 28.Take 803. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.792 + 297 =
30. 30.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 910: 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 1. What is that number?
33. 33.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 124: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 924. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 831. 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 4. What is that number?
38. 38.198 + 891 =
39. 39.Take 862. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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