Number Concepts to 1000
Warm-up
Show 342 with base-ten blocks. What number is this? What does the 3 mean? (300, three hundreds.) What does the 4 mean? (40, four tens.) Now show 408. What is missing? (No tens rod.) What does the zero mean in 408? It holds the tens place so the 4 stays a four hundred.
Explore
Skip-count challenge: start at 347, count by 10s forward to 437. What changed? (Only the tens digit.) Start at 695, count forward by 5s to 720. What happened at 700? Bridge-crossing moments reveal the carry mechanism of place value.
Consolidate
Practice
Students represent 8 three-digit numbers with blocks and record the value of each digit. Skip-count by 4s, 6s, and 9s from given starting points. Exit ticket: what is the value of each digit in 628?
Exit ticket
Students represent 8 three-digit numbers with blocks and record the value of each digit. Skip-count by 4s, 6s, and 9s from given starting points. Exit ticket: what is the value of each digit in 628?
In 573: 7 is in the tens place, value = 70. In 739: 7 is in the hundreds place, value = 700. In 307: 7 is in the ones place, value = 7. Same digit, three different values depending on position.
0, 7, 14, 21, 28, 35, 42, 49, 56. This is the 7-times table. Students who can skip-count to 56 know all multiplication facts for 7 up to 7x8=56.