2-digit minus 2-digit numbers is probably one of the toughest math skills we develop in grade 2!

Many students are comfortable drawing tens and ones to help solve subtraction problems. We have also been using open number lines as another strategy. Please have a look at the two examples students shared today. Your child is encouraged to try using open number lines! (Open meaning that ALL whole numbers do not appear on the number line; the child jumps along the number line using friendly numbers that they write on the line).

Here, we know that 38+?=71, so we can go from left to right on the number line.