1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 955 · 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. 1.198 + 891 =
2. 2.Do the 1089 trick with 795: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 496: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 380. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 197: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.792 + 297 =
8. 8.Do the 1089 trick with 206: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
10. 10.396 + 693 =
11. 11.Take 963. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 236: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
14. 14.Take 179. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.495 + 594 =
16. 16.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 890. Reverse its digits and take the smaller number away from the bigger one. 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. 20.891 + 198 =
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
23. 23.Take 977. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 567: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 345: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
27. 27.297 + 792 =
28. 28.Take 905. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 580. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.594 + 495 =
31. 31.Do the 1089 trick with 950: 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 7. What is that number?
33. 33.Take 773. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 865. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 199. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 932: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 260: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 590: reverse and subtract, then reverse that answer and add. What do you get?

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