1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 28 · 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 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 430. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.891 + 198 =
5. 5.Do the 1089 trick with 852: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 240. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 407. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 189: 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 2. What is that number?
10. 10.594 + 495 =
11. 11.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
13. 13.Do the 1089 trick with 360: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.792 + 297 =
16. 16.Take 841. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 347. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 682: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 886. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.495 + 594 =
21. 21.396 + 693 =
22. 22.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
24. 24.Do the 1089 trick with 114: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 560: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
28. 28.Do the 1089 trick with 759: 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 7. What is that number?
30. 30.Take 579. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 218: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 668: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 952. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.297 + 792 =
36. 36.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 699. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 844. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 316: reverse and subtract, then reverse that answer and add. What do you get?

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