Great trick for teaching how to make Students use a highlighter to find the and then circle the other number with a crayon. Although, I think it would be easier to always make 10 with the larger number, not necessarily the first number in the equation.

Choose a number, write it in the middle box. Kids search vertically, horizontally and diagonally to find addends that equal the number. In grade we use this for numbers as we practice mental math strategies. It's a great "spo

First Grade Shenanigans: math/ represent and analyze mathematical situations and structures using algebraic symbols/ represent the idea of a variable as an unknown quantity using a letter or a symbol fact family