1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 69 · 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 407. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
3. 3.792 + 297 =
4. 4.Do the 1089 trick with 620: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.198 + 891 =
6. 6.297 + 792 =
7. 7.Do the 1089 trick with 207: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 987: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 682. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 169: 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 6. What is that number?
13. 13.495 + 594 =
14. 14.396 + 693 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
16. 16.Take 275. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
18. 18.Do the 1089 trick with 942: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 790. 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 2. What is that number?
21. 21.Take 953. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
23. 23.Do the 1089 trick with 521: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 926: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 802. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.891 + 198 =
28. 28.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 139. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
32. 32.Do the 1089 trick with 198: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 274. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 349. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 188. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 641. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 951. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 480. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 248. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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