1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 208 · 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 340: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.396 + 693 =
3. 3.Do the 1089 trick with 476: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
5. 5.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.891 + 198 =
7. 7.495 + 594 =
8. 8.Do the 1089 trick with 844: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.594 + 495 =
10. 10.Do the 1089 trick with 681: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 873: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 932. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 155. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 622. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 469: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.198 + 891 =
19. 19.Take 441. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 965. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 134: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 128: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.693 + 396 =
24. 24.Take 250. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 189: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 268. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.792 + 297 =
28. 28.Take 103. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 875. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 316: reverse and subtract, then reverse that answer and add. 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 3. What is that number?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
34. 34.Take 359. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 672. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 278: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
39. 39.Take 773. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?

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