Unit 7, Lesson 1
Compare, Count On, and Count Back
Grade 2
Activity 1
Notice the Difference
Tyler and Elena find the value of
Tyler
Elena
What do you notice? What do you wonder?
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Locate and label 203 and 198.
Compare, using
, , or . Find the value of
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Locate and label 673 and 680.
Compare, using
, , or . Find the value of
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Locate and label 501 and 499.
Find the value of
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Find the value of
Activity 2
What’s the Big Difference?
Number line. Five tick marks labeled 234, 334, 434, and 2 question marks. Arrows from 234 to 334, from 334 to 434, from 434 to question mark, from question mark to question mark.
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Fill in the missing numbers.
Number line. 5 evenly spaced tick marks. First tick mark, 502. Second tick mark, labeled blank. Third tick mark, 702. Fourth tick mark, labeled blank. Last tick mark, 902.Does this number line show counting on by tens or counting on by hundreds?
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Fill in the missing numbers.
Does this number line show counting on by tens or counting on by hundreds?
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Fill in the missing numbers.
Number line. 5 evenly spaced tick marks. First tick mark, labeled 278. Second tick mark, labeled blank. Third tick mark, labeled 478. Fourth tick mark, labeled 578. Last tick mark, labeled blank.Does this number line show counting on by tens or counting on by hundreds?
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Fill in the missing numbers, counting on by tens.
739, 749, __________, 769, __________
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Explain how you know your numbers show counting on by tens and not counting on by hundreds.
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