Mixed Subtraction with Reptiles and Amphibians — Grade 1

This Grade 1 worksheet mixes two kinds of subtraction so the same reptiles keep a child thinking. On some rows a group of frogs, snakes and a turtle has a written number taken away and the child finds how many are left; on others the number left is given and the child finds how many went away. Switching between finding the result and finding the missing part stops the page becoming automatic, and it keeps every row a small decision rather than a habit. The amounts stay within twenty, so whichever kind a row turns out to be, the child can settle it by counting the pictures.

Variety is the teaching tool here: when rows alternate between taking a number away and finding what was taken, a child must read and decide before solving. That deliberate switching is exactly the flexible practice Grade 1 calls for, and keeping the reptiles pictured and the numbers within twenty keeps it grounded.

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