- Question 1: 11 - 2 blank.
- Question 2: 21 - 13 blank.
- Question 3: 10 - 3 blank.
- Question 4: 14 - 12 blank.
- Question 5: 18 - 13 blank.
- Question 6: 4 - 1 blank.
- Question 7: 21 - 11 blank.
- Question 8: 5 - 1 blank.
- Question 9: 13 - 7 blank.
This sheet practises taking away with numbers up to 21. 3 of 9 problems cross 10, which is what makes one sheet harder than another at this stage. The catalog says Grade 1; the numbers say otherwise, reaching past 20. Treat it as Grade 2 work, or as a stretch for confident Grade 1 children.
The nine problems on this sheet: 11 - 2, 21 - 13, 10 - 3, 14 - 12, 18 - 13, 4 - 1, 21 - 11, 5 - 1, 13 - 7.
A wrong answer breaks the picture, so a child sees the mistake straight away and can fix it without waiting for an adult. It shows where they went wrong, not why. The answers are always 2 to 10, one per piece, so ask children to solve all nine before placing any — otherwise the last few can be found by elimination.
Nine problems is about five to ten minutes for a secure child, which fits early finishers and morning work. It practises something already taught rather than introducing anything new.
The answer key lists all nine results, which is the quickest way to check the level before printing. Note that crossing 10 only comes up in the subtraction here; adding over ten does not appear on this type of sheet. The completed picture shows a Ocean Life scene.
