1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 941 · 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. 1.396 + 693 =
2. 2.Do the 1089 trick with 883: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 127. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
6. 6.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.891 + 198 =
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
10. 10.Do the 1089 trick with 992: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 976: 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 3. What is that number?
14. 14.198 + 891 =
15. 15.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 932: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.495 + 594 =
20. 20.Take 169. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
22. 22.Do the 1089 trick with 228: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.693 + 396 =
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
25. 25.Take 429. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 520. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 179. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 159. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 842: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 277. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.594 + 495 =
32. 32.792 + 297 =
33. 33.Take 895. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 378. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 934. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 845: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?

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