Add and Subtract Color by Code: Watch the Sign

This color by code worksheet refuses to let anyone settle into autopilot: its twelve shapes mix addition and subtraction on the same page — sums stay within 10, while a take-away can start as high as 12. One shape asks 4 plus 3, the next 11 minus 2, and the only way to color them all correctly is to read each operation sign before computing, then match the answer to the four-color legend and fill the shape in with the matching crayon.

Mixing operations targets the single most common error in early arithmetic — answering the sign you expected instead of the sign that is printed. Children who breeze through a page of pure addition will often add everything on a mixed page too, and this sheet makes that habit visible immediately, because a wrong operation produces a wrong color. The fix it teaches is small and mighty: touch the sign, say 'plus' or 'minus' out loud, then compute. Twelve shapes of that discipline builds the flexible switching that real math depends on.

Print the PDF free and let the colors do the correcting. If subtraction alone still feels wobbly, the subtraction color by code page isolates it first; when this mixed page is easy, the sums from 11 to 20 page pushes the addition facts past ten.