1089 Trick Worksheet
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.
NameDateTime takenScore ___ / 40
- 1.Do the 1089 trick with 610: reverse and subtract, then reverse that answer and add. What do you get?
- 2.297 + 792 =
- 3.Take 628. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 4.Take 735. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 5.693 + 396 =
- 6.Take 256. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 7.Do the 1089 trick with 279: reverse and subtract, then reverse that answer and add. What do you get?
- 8.792 + 297 =
- 9.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
- 10.Do the 1089 trick with 781: reverse and subtract, then reverse that answer and add. What do you get?
- 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
- 12.Do the 1089 trick with 804: reverse and subtract, then reverse that answer and add. What do you get?
- 13.198 + 891 =
- 14.Take 701. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 15.Take 127. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 16.Do the 1089 trick with 193: reverse and subtract, then reverse that answer and add. What do you get?
- 17.Take 147. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 18.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
- 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
- 20.Take 136. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 21.Take 933. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 22.Do the 1089 trick with 974: reverse and subtract, then reverse that answer and add. What do you get?
- 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
- 24.Do the 1089 trick with 581: reverse and subtract, then reverse that answer and add. What do you get?
- 25.Do the 1089 trick with 199: reverse and subtract, then reverse that answer and add. What do you get?
- 26.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 27.Take 176. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 28.Do the 1089 trick with 991: reverse and subtract, then reverse that answer and add. What do you get?
- 29.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 30.Do the 1089 trick with 357: reverse and subtract, then reverse that answer and add. What do you get?
- 31.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 32.Do the 1089 trick with 854: reverse and subtract, then reverse that answer and add. What do you get?
- 33.495 + 594 =
- 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
- 35.Do the 1089 trick with 688: reverse and subtract, then reverse that answer and add. What do you get?
- 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
- 37.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 38.Take 219. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 39.891 + 198 =
- 40.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
Answer key
- 1089
- 1089
- 198
- 198
- 1089
- 396
- 1089
- 1089
- 1089
- 1089
- 495
- 1089
- 1089
- 594
- 594
- 1089
- 594
- 1089
- 198
- 495
- 594
- 1089
- 792
- 1089
- 1089
- 792
- 495
- 1089
- 792
- 1089
- 792
- 1089
- 1089
- 693
- 1089
- 891
- 792
- 693
- 1089
- 594
Free maths tricks lessons, practice and worksheets at talentjr.in/maths-tricks