1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 265 · 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 850: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 217. 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 3. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
6. 6.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 836: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.396 + 693 =
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
10. 10.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 994. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 248. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 832. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 439. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.693 + 396 =
16. 16.Take 608. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 320: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 230. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.594 + 495 =
21. 21.495 + 594 =
22. 22.Take 442. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 951. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 427. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 214: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.297 + 792 =
28. 28.Do the 1089 trick with 116: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
31. 31.Take 751. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
37. 37.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 365. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 852: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 543: reverse and subtract, then reverse that answer and add. What do you get?

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