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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
- 2.Take 721. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 3.495 + 594 =
- 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
- 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
- 6.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 7.Take 366. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 8.Take 941. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 9.Do the 1089 trick with 822: reverse and subtract, then reverse that answer and add. What do you get?
- 10.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 11.Do the 1089 trick with 139: reverse and subtract, then reverse that answer and add. What do you get?
- 12.693 + 396 =
- 13.792 + 297 =
- 14.396 + 693 =
- 15.Do the 1089 trick with 552: reverse and subtract, then reverse that answer and add. What do you get?
- 16.Do the 1089 trick with 319: reverse and subtract, then reverse that answer and add. What do you get?
- 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
- 18.297 + 792 =
- 19.Take 462. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
- 21.Do the 1089 trick with 742: reverse and subtract, then reverse that answer and add. What do you get?
- 22.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
- 23.Take 519. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 24.Take 578. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 25.Do the 1089 trick with 370: reverse and subtract, then reverse that answer and add. What do you get?
- 26.Take 803. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 27.Take 972. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 28.594 + 495 =
- 29.198 + 891 =
- 30.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
- 31.Take 612. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 32.Take 811. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 33.Do the 1089 trick with 300: reverse and subtract, then reverse that answer and add. What do you get?
- 34.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
- 36.Take 724. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 37.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 38.Take 671. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 39.Do the 1089 trick with 854: reverse and subtract, then reverse that answer and add. What do you get?
- 40.Do the 1089 trick with 351: reverse and subtract, then reverse that answer and add. What do you get?
Answer key
- 594
- 594
- 1089
- 792
- 891
- 792
- 297
- 792
- 1089
- 693
- 1089
- 1089
- 1089
- 1089
- 1089
- 1089
- 396
- 1089
- 198
- 297
- 1089
- 1089
- 396
- 297
- 1089
- 495
- 693
- 1089
- 1089
- 1089
- 396
- 693
- 1089
- 891
- 693
- 297
- 693
- 495
- 1089
- 1089
Free maths tricks lessons, practice and worksheets at talentjr.in/maths-tricks