Subtracting with Teen Numbers
Count backward from teen numbers
Subtract small numbers from teen numbers
Develop perseverance in mathematical thinking
“Wisdom is supreme. Get wisdom. Yes, though it costs all your possessions, get understanding.”
— Proverbs 4:7 (WEB)Just as we learn to count step by step, we learn wisdom gradually by practicing and understanding
BibleMouse Math Adventure begins! Remind students about yesterday's subtraction from teen numbers
Demonstrate counting backward from teen numbers
Students use number line to practice subtraction by hopping backward
Simpler: Use fewer hops, stay between 10-15
Challenge: Try subtraction with larger numbers
Recap our backward counting adventure
Coming up: Tomorrow we'll explore number line subtraction more deeply
Backward counting develops number sense and prepares for more complex subtraction
Children might get confused tracking backward on number line
Consistent understanding of moving backward to subtract