Hauptinhalt
Nebraska Math
Grade 2: NUMBER
Students will solve problems and reason with number concepts using multiple representations, make connections within math and across disciplines, and communicate their ideas.
Without counting, recognize and verbally label structured arrangements for briefly shown collections using groups, multiplicative thinking, and place value (e.g.,” I saw 48.” “How did you know?” “I saw 4 groups of 10 and 2 groups of 4 is 8...4 tens and 8 ones...48”).
Count within 1,000, including skip counting by 5s, 10s, and 100s starting at a variety of multiples of 5, 10, or 100.
Read and write numbers within the range of 0 to 1,000 using standard, word, and expanded forms.
- Expanded form of numbers
- Hundreds, tens, and ones
- Identify the value of a digit (ones, tens, hundreds)
- Identifying value in digits
- Number and word form of a number
- Place value blocks within 1,000
- Place value tables within 1,000
- Place value tables within 1,000
- Word form and expanded form
- Write numbers in different forms
- Write numbers in number and expanded form
- Write numbers in number and word form
- Write numbers in word and expanded form
Understand 100 as a bundle, collection, or (more abstractly) composition of ten tens and that the three digits of a three-digit number represent a composition of some hundreds, some tens, and some ones.
- Add 10s and 100s (no regrouping)
- Add within 1,000 using place value blocks
- Adding 10 or 100
- Adding 1s, 10s, and 100s
- Creating the largest number
- Expanded form of numbers
- Hundreds, tens, and ones
- Identify the value of a digit (ones, tens, hundreds)
- Identifying value in digits
- Place value blocks within 1,000
- Place value tables within 1,000
- Place value tables within 1,000
- Regroup whole numbers
- Subtract 10s and 100s (no regrouping)
- Subtract within 1,000 using place value blocks
- Subtracting 1, 10, or 100
- Subtracting 1s, 10s, and 100s
- Subtracting 3-digit numbers (no regrouping)
- Subtracting with place value blocks (regrouping)
- Use place value blocks to show numbers within 1,000
- Word form and expanded form
- Write numbers in number and expanded form
Compare two three-digit numbers by using symbols <, >, = and justify the comparison based on the value of the hundreds, tens, and ones.
Fluently add and subtract within 20.
- Add & subtract within 20
- Add within 20
- Add within 20 visually
- Adding 7 + 6
- Adding 8 + 7
- Adding within 20 using place value blocks
- Adding within 20 using ten frames
- Addition and subtraction word problems: gorillas
- Addition and subtraction word problems: superheroes
- Subtract within 20
- Subtract within 20 using a number line
- Subtract within 20 using place value blocks
- Subtract within 20 using ten frames
- Subtract within 20 visually
- Subtracting 14 - 6
Add and subtract within 100 strategies based on place value including properties of operations, relationships between addition and subtraction, and algorithms.
- Add 10s and 100s (no regrouping)
- Add 2-digit numbers by making tens
- Add using groups of 10 and 100
- Add within 1,000 using place value blocks
- Add within 100 using a number line
- Add within 100 using place value blocks
- Add within 20
- Add within 20 visually
- Adding 10 or 100
- Adding 2-digit numbers without regrouping
- Adding 3-digit numbers (no regrouping)
- Adding 53+17 by making a group of 10
- Adding multiple 2-digit numbers word problems
- Adding up to four 2-digit numbers
- Adding up to four 2-digit numbers word problems
- Adding with regrouping
- Addition and subtraction with number lines
- Addition using groups of 10 and 100
- Addition word problems within 100
- Break apart 2-digit addition problems
- Break apart 3-digit addition problems
- Breaking apart 2-digit addition problems
- Find the missing number (add and subtract within 100)
- Missing numbers in addition and subtraction
- Multi step addition word problem
- Regrouping whole numbers: 675
- Select strategies for adding within 100
- Strategies for adding 2-digit numbers
- Subtract 10s and 100s (no regrouping)
- Subtract on a number line
- Subtract within 1,000 using place value blocks
- Subtract within 100 using a number line
- Subtract within 100 using place value blocks
- Subtracting 1, 10, or 100
- Subtracting 10s using place value
- Subtracting 1s using place value
- Subtracting 1s, 10s, and 100s
- Subtracting 3-digit numbers (no regrouping)
- Subtracting a 1-digit number with regrouping
- Subtracting two-digit numbers without regrouping
- Subtracting with place value blocks (regrouping)
- Subtraction word problems within 100
- Understanding place value when adding ones
- Understanding place value when adding tens
Mentally add or subtract 10 or 100 to or from a given number 100 to 900.
Add up to three two-digit numbers using strategies based on place value and understanding of properties.
- Add 2-digit numbers by making tens
- Add within 100 using a number line
- Add within 100 using place value blocks
- Adding 10 or 100
- Adding 2-digit numbers without regrouping
- Adding 53+17 by making a group of 10
- Adding with regrouping
- Addition and subtraction with number lines
- Break apart 2-digit addition problems
- Breaking apart 2-digit addition problems
- Find the missing number (add and subtract within 100)
- Missing numbers in addition and subtraction
- Select strategies for adding within 100
- Strategies for adding 2-digit numbers
- Subtract within 100 using a number line
- Understanding place value when adding ones
- Understanding place value when adding tens
Add and subtract within 1,000 using concrete models, drawings, and strategies that reflect an understanding of place value and the properties of operations.
- Add 10s and 100s (no regrouping)
- Add 2-digit numbers by making tens
- Add on a number line
- Add using groups of 10 and 100
- Add within 1,000 using place value blocks
- Add within 100 using a number line
- Add within 100 using place value blocks
- Adding 10 or 100
- Adding 1s, 10s, and 100s
- Adding 2-digit numbers without regrouping
- Adding 3-digit numbers (no regrouping)
- Adding 53+17 by making a group of 10
- Adding and subtracting on number line
- Adding multiple 2-digit numbers word problems
- Adding up to four 2-digit numbers
- Adding up to four 2-digit numbers word problems
- Adding with regrouping
- Addition and subtraction with number lines
- Addition using groups of 10 and 100
- Break apart 2-digit addition problems
- Break apart 3-digit addition problems
- Breaking apart 2-digit addition problems
- Breaking apart 3-digit addition problems
- Find the missing number (add and subtract within 100)
- Hundreds, tens, and ones
- Missing numbers in addition and subtraction
- Regrouping whole numbers: 675
- Select strategies for adding within 100
- Select strategies for adding within 1000
- Strategies for adding 2-digit numbers
- Subtract 10s and 100s (no regrouping)
- Subtract on a number line
- Subtract within 1,000 using place value blocks
- Subtract within 100 using a number line
- Subtract within 100 using place value blocks
- Subtracting 1, 10, or 100
- Subtracting 10s using place value
- Subtracting 1s using place value
- Subtracting 1s, 10s, and 100s
- Subtracting 3-digit numbers (no regrouping)
- Subtracting a 1-digit number with regrouping
- Subtracting two-digit numbers without regrouping
- Subtracting with place value blocks (regrouping)
- Understanding place value when adding ones
- Understanding place value when adding tens
Solve authentic problems involving addition and subtraction within 100 in situations of addition and subtraction, including adding to, subtracting from, joining and separating, and comparing situations with unknowns in all positions using objects, models, drawings, verbal explanations, expressions, and equations.
- Add and subtract on the number line word problems
- Add and subtract within 20 word problems
- Adding multiple 2-digit numbers word problems
- Adding up to four 2-digit numbers word problems
- Addition and subtraction word problems: gorillas
- Addition word problem: horses
- Addition word problems within 100
- Multi step addition word problem
- Multi-step subtraction word problem
- Subtraction word problem: basketball
- Subtraction word problem: crayons
- Subtraction word problems within 100
Create authentic problems to represent one-step addition and subtraction within 100 with unknowns in all positions.
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Use repeated addition to find the total number of objects arranged in an array no larger than five rows and five columns and write an equation to express the total.
Identify a group of objects from 0 to 20 as even or odd by counting by 2s or by showing even numbers as a sum of two equal parts.