In National 4 Maths use negative numbers in addition and subtraction problems including subtracting a negative number.

Addition & subtraction strategies to solve two-digit equations using an open number line.

Find out about the column method to subtract more than 4-digit numbers with this Year 5 article from BBC Bitesize.

Addition and subtraction with regrouping using different strategies to solve.

In fourth grade, students focus most on using all four operations - addition, subtraction, multiplication, and division - to solve multi-step word problems involving multi-digit numbers. Fourth ...