You can add or subtract numbers in lots of different ways. You can use number lines, number bonds, fact families, 10 squares and counters, or even just writing the numbers down. Sometimes it is faster ...
Addition & subtraction strategies to solve two-digit equations using an open number line. In this lesson, students practice using different addition and subtraction strategies to solve two-digit ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results