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SBE 2nd Grade - Unit 6 - Quiz 2 - Addition and Subtraction Strategies

Last updated almost 5 years ago

6 questions

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Question 1

1.

Show on the open number line how you can solve 500 – 127

Question 2

2.

Write an equation that represents the base 10 model above.

Question 3

3.

Jackie found 347 – 199 using an open number line. She added up to subtract. Look at her steps below:
· First, she added 1.
· Next, she added 100.
· Finally, she added 47.
Draw Jackie’s number line below.

Question 4

4.

Andy and Jason used different strategies to find 901 – 899.

Andy counted up, starting at 899 and counting up 2 to get to 901. Andy’s answer is 2.
Jason counted back, starting at 901 and counted back 899 to get an answer of 2.

Whose strategy is more efficient? How do you know? Type your answer in complete sentences below.

Question 5

5.

Look at the charts above. Explain the mistake Colin made.

Question 6

6.

How many students are in Mrs. B's class?