1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 740 · 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. 1.792 + 297 =
2. 2.Do the 1089 trick with 450: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 963. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
5. 5.Do the 1089 trick with 947: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
8. 8.297 + 792 =
9. 9.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 412. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 619: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
13. 13.Take 881. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.495 + 594 =
15. 15.891 + 198 =
16. 16.Take 964. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.594 + 495 =
18. 18.Do the 1089 trick with 609: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 816: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 450. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 240: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 983: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 568. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 621: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 629: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 842. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 177. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 630: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 113. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.396 + 693 =
37. 37.198 + 891 =
38. 38.Do the 1089 trick with 397: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 153: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 178: reverse and subtract, then reverse that answer and add. What do you get?

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