MAFS.2.NBT.1.4 Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, using >, =, and < symbols to record the results of comparisons.
Cognitive Complexity Level: 2 – Basic Application of Skills and Concepts
[divider] [/divider] Students are able to…
- Use concrete materials to compare two 3-digit numbers and refer to models while explaining reasoning.
- Describe comparisons using precise language (greater than, less than, equal to, same as) and record them using symbols (<, >, =).
- Justify reasoning as they compare two 3-digit numbers. For example, “I know 258 is less than 285 because I saw that both numbers have 2 hundreds but 285 has 8 tens where 258 only has 5 tens making 258 less than 285.”
[divider] [/divider] Students are able to…because teachers:
- Engage students in multiple learning experiences where they explore comparing two 3-digit numbers using a variety of materials (base ten blocks, hundreds chart, number lines).
- Pose questions such as “which is greater” or “which is lesser” eliciting student explanation of how they compare the numbers.
- Facilitate student discussion about comparing two 3-digit numbers and how to record the comparisons using symbols.
[divider] [/divider] Questions to ask students:
- Ask: Ask students to compare 276 and 267.
- Sample answer that indicates understanding: “276 is greater than 267 because it has one more ten than 267.”
- Sample answer that indicates an incomplete understanding or a misconception: “276 is greater because 7 is greater than 6” “They are equal”
- Ask: Ask students when comparing two 3-digit numbers which place value do you look at first and why?
- Sample answer that indicates understanding: “I look at the hundreds place because it is greater than the tens and ones. If the numbers have the same digit in the hundreds then I look at the next greatest place value the tens place.”
- Ask: Ask students how they could prove that 308 is greater than 299.
- Sample answer that indicates understanding: “There are 3 hundreds in 308 and 299 only has 2 hundreds.” (Student might use base ten blocks/quick pictures/ number line/ hundreds chart to support reasoning).
[divider] [/divider] Additional Resources:
Additional in depth content knowledge
Video: Compare two 3-digit numbers by comparing number parts
https://learnzillion.com/lesson_plans/6392-compare-two-3-digit-numbers-by-comparing-number-parts
[divider] [/divider] Sample Formative Assessment Tasks:
[divider] [/divider] Resources/Tasks to Support Your Child at Home:
- Compare War. Using a deck of cards Ace-9 (ace represents 1), have each player choose 3 cards to create a three-digit number. The person with the greatest number wins the rounds and takes the cards. The person at the end with the most cards wins the game.
- Kahn Academy Tutorial Video: Comparing Whole Numbers
- LearnZillion Instructional Video: Compare Two 3-Digit Numbers by Comparing Number Parts