1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 860 · 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.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.891 + 198 =
3. 3.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 690: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.792 + 297 =
6. 6.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 178: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 670: 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 7. What is that number?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
11. 11.Take 240. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
15. 15.396 + 693 =
16. 16.Do the 1089 trick with 680: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 937: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 500. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
20. 20.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.297 + 792 =
22. 22.Do the 1089 trick with 410: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 308. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.693 + 396 =
26. 26.594 + 495 =
27. 27.495 + 594 =
28. 28.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 396: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.198 + 891 =
31. 31.Do the 1089 trick with 249: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 502. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 395. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 163: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 814: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 237: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
40. 40.Take 572. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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