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

Activity: How to subtract two-digit numbers Discover all about subtracting two-digit numbers with this interactive activity, then put your knowledge to the test.

Quiz: Subtraction with up to 4-digit numbers Complete this quiz to understand how to subtract with up to four-digit numbers. Then put your knowledge to the test.

SUBJECTS: Maths YEARS: F–2 Learn the "counting back" strategy to help you solve tricky subtraction problems. In this lesson, Miss James demonstrates how to use a number line correctly, and she ...

A learning/teaching approach used base-ten blocks to embody the English named-value system of number words and digit cards to embody the positional base-ten system of numeration. Steps in addition and ...