MAFS.1.NBT.2.3 Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <.

Cognitive Complexity Level: 1-Recall

[divider] [/divider] Students are able to… 

  • Use objects, ten frames, number lines and hundreds charts to compare two-digit numbers
  • Describe the comparison using greater than, less than, fewer than and same as
  • Use mathematical symbols to compare numbers

[divider] [/divider] Students are able to…because teachers:

  • Provide students with a variety of materials to explore comparison of numbers
  • Pose purposeful questions to advance understanding of comparing numbers
  • Facilitate discussions of student strategies
  • Provide experiences to compare numbers when written as numerals and using mathematical symbols

 [divider] [/divider] Questions to ask students:

  • Ask:  Which is greater, 35 or 42?  How do you know?
    • Sample answer that indicates understanding: I know that 42 is greater because 4 tens is greater than 3 tens.
  • Ask: Which is less, 73 or 79? How do you know?
    • Sample answer that indicates understanding: I know that 73 is less because the both have 7 tens, but 3 ones is less than 9 ones.

[divider] [/divider] Additional Resources:

Additional in depth content knowledge

Video: Khan Academy – Comparing Numbers

https://www.khanacademy.org/math/cc-1st-grade-math/cc-1st-place-value/modal/v/greater-than-and-less-than-symbols

[divider] [/divider] Sample Formative Assessment Tasks:

[divider] [/divider] Resources/Tasks to Support Your Child at Home:

  • Give your child two sets of objects from 1 to 100.  Encourage them to group the objects by ten and count on by ones to determine total value.  Then have your child determine which object there is a greater amount of.  Then record the numbers with the symbols <, >, or =.