1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 646 · 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.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.891 + 198 =
3. 3.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 900. 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 2. What is that number?
6. 6.Do the 1089 trick with 729: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 609. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 956. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.396 + 693 =
10. 10.Do the 1089 trick with 126: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 997. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 680. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 280. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 220: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 399. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.792 + 297 =
22. 22.Take 987. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.198 + 891 =
25. 25.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 507. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.594 + 495 =
28. 28.495 + 594 =
29. 29.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 902. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 936: 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 8. What is that number?
33. 33.Take 533. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 790: 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 7. What is that number?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
37. 37.Do the 1089 trick with 692: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 154. Reverse its digits and take the smaller number away from the bigger one. 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 376: reverse and subtract, then reverse that answer and add. What do you get?

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