1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 158 · 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 197: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 439: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 862. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.594 + 495 =
5. 5.Take 650. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 245. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
10. 10.Do the 1089 trick with 604: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.792 + 297 =
12. 12.Take 103. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 980. 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 3. What is that number?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
16. 16.Take 144. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 613: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 486: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.495 + 594 =
21. 21.Take 762. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 751: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.297 + 792 =
24. 24.693 + 396 =
25. 25.891 + 198 =
26. 26.Do the 1089 trick with 462: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 813. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 215. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
30. 30.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 984: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 964: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 125: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.198 + 891 =
36. 36.Take 750. 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
39. 39.Do the 1089 trick with 318: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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