In this topic, students will:
subtract 10 or 100 mentally using place-value strategies
use an open number line to subtract 3-digit numbers
use models to subtract 3-digit numbers
use models and place value to subtract
explain why subtraction strategies work using models, place value, and mental math
At-home Practice:
Supplies:
a deck of cards (Remove face cards)
Divide the cards evenly among players. Player 1 flips over 3 cards and forms a 3-digit number. If the number is even, Player 2 must add 10. If odd, Player 2 must add 100. If correct, Player 2 keeps the cards. If Player 2 is incorrect, Player 1 keeps the cards. Trade roles and repeat until all cards have been won. The player with the most cards wins.