1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 296 · 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 1. What is that number?
2. 2.Do the 1089 trick with 610: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 511: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 553. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 350. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
7. 7.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 391. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.792 + 297 =
10. 10.Do the 1089 trick with 579: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
12. 12.Take 107. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.891 + 198 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
16. 16.198 + 891 =
17. 17.Do the 1089 trick with 400: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 270. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
21. 21.Do the 1089 trick with 996: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 496: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 377. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.495 + 594 =
25. 25.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 560: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.396 + 693 =
28. 28.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 319: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 461. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 690: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 751: 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 6. What is that number?
36. 36.Do the 1089 trick with 245: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.693 + 396 =
39. 39.594 + 495 =
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?

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