Grade 2 Unit 5
Lesson 12: Order Numbers
CC BY 2021 Illustrative Mathematics®
Grade 2 Unit 5
Lesson 12: Order Numbers
CC BY 2021 Illustrative Mathematics®
Find the value of each expression mentally.
Kiran and Andre put a list of numbers in order from least to greatest.
Who do you agree with? Why?
Be prepared to explain your thinking. Use what you know about place value or the number line to justify your reasoning.
Estimate the location of 839, 765, 788, 815, and 719 on the number line. Mark each number with a point. Label the point with the number it represents.
Order the numbers from least to greatest.
719
788
839
815
765
Estimate the location of 199, 245, 173, 218, and 137 on the number line. Mark each number with a point. Label the point with the number it represents.
Order the numbers from greatest to least.
199
245
137
218
173
Order the numbers from least to greatest.
Explain or show your thinking. Use the number line if it helps.
405
545
445
504
454
Was it more helpful for you to put the numbers in order first or put them on the number line first? Explain.
Estimate the location and label 748, 704, 762, 789, and 712 on the number line.
Order the numbers from least to greatest.
704
762
789
712
748