Mixed Subtraction with Trees — Grade 1

This Grade 1 worksheet mixes two kinds of subtraction so the same trees keep a child thinking. On some rows a group of oaks, pines and a palm 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.

A page that asks only one kind of question lets a child coast; a mixed page does not. Alternating result-unknown and missing-part rows keeps attention on the meaning of each problem, which is why mixed practice is valuable at Grade 1. The within-twenty range and pictured trees keep the focus on thinking, not on big numbers.

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