Subtraction Within 20: Think Addition
Understand subtraction as 'counting up' from the smaller number
Solve subtraction problems by counting forward on a number line
Develop patience and persistence in problem-solving
“Wisdom is supreme. Get wisdom. Yes, though it costs all your possessions, get understanding.”
— Proverbs 4:7 (WEB)Just as we build mathematical understanding step by step, we build wisdom gradually through learning and persistence
Today's BibleMouse lesson will help us learn how counting up can make subtraction easier! We'll be mathematical explorers, discovering new ways to solve problems.
Let's practice counting up to solve subtraction problems. When the numbers are close together, we can count forward from the smaller number to find the difference.
Students will complete a BibleMouse worksheet practicing subtraction by counting up
Simpler: Use linking cubes to physically count up
Challenge: Solve problems without the number line
Let's celebrate our mathematical discoveries today!
Coming up: Tomorrow, we'll learn how to break apart numbers to make subtraction easier!
Counting up is a natural way for children to understand subtraction, bridging their understanding between addition and subtraction
Children may initially find it challenging to count forward for subtraction
Confidence in using the number line, understanding of 'counting up' concept