What is the value of 2 rods? Explain how you know.
20; Possible response: There are 2 tens.
Look at the purple number in Part 1. How many tens are in 50? How many extra ones are in 50?
5 tens and no extra ones.
Look at the red numbers in Part 2. Which 2 numbers have a sum of 7?
1 and 6.
How does adding 1 and 6 help you to know how to add 10 and 60?
Possible response: 10 has 1 ten and 60 has 6 tens. Adding the digits in the tens place is like adding 1 and 6.
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