Mixed Subtraction with Dinosaurs — Grade 1

Because the rows vary, a child cannot switch off. A group of a T. rex, a stegosaurus and a raptor minus a written number asks for the result; a group with the result shown asks for the missing part. Both are within twenty, and meeting them together builds the flexible subtraction sense Grade 1 is after — seeing that start, change, and result are linked and any one can be the blank. Because every amount is small and pictured, the child can always fall back on counting the dinosaurs to confirm an answer.

When a child cannot predict whether the next row wants the result or the missing part, they stay with the meaning of subtraction rather than a memorised motion. That is the value of a mixed page at Grade 1, and holding the numbers within twenty with countable dinosaurs keeps the practice honest and self-checking.

Children who like dinosaurs enjoy not knowing which question is coming next, and it keeps a small group thinking. When this feels easy, try mixed subtraction with easter, or mixed subtraction with furniture. You can also browse every subtraction worksheet or the whole dinosaurs collection for grade 1 — each sheet prints cleanly in black and white or plays online for free.