1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 440 · 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 220: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 802. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 891: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 421: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 513: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 167: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.396 + 693 =
8. 8.Take 380. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 529: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
12. 12.Take 927. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
14. 14.Take 305. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
17. 17.Do the 1089 trick with 228: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 136: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 299: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.495 + 594 =
22. 22.Do the 1089 trick with 802: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.792 + 297 =
24. 24.198 + 891 =
25. 25.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 531. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 196: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
30. 30.594 + 495 =
31. 31.Do the 1089 trick with 801: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 603. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 823: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 439. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 199. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 207. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 318: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 179: reverse and subtract, then reverse that answer and add. What do you get?

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