Look at Problem A. What number do you see? How do you known?
56; 56 has 5 tens and 6 ones.
What is 10 more than 56? How do you know?
66; 66 is 1 ten more than 56.
What is 10 less than 56? How do you know?
46; 46 is 1 ten less than 56.
Look at Problem B. What number do you see? How do you know?
430; 430 has 4 hundreds and 3 tens.
Look at Problem C. What are the missing numbers?
483, 485, 487, and 490.
Skip count by 5s starting at 480.
480, 485, 490, and so forth.
Skip count by 10s starting at 490.
490, 500, 510, 520, and so forth.
Skip count by 100s starting at 520.
520, 620, 720, 820, and so forth.