Основно съдържание
Math
Oklahoma Math
Second Grade (2): Numbers & Operations (N)
Read, write, discuss, and represent whole numbers up to 1,000. Representations should include, but are not limited to, numerals, words, pictures, tally marks, number lines, and manipulatives.
- Add on a number line
- Adding and subtracting on number line
- Compare 2-digit numbers
- Expanded form of numbers
- 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
- Regrouping whole numbers: 675
- Round to nearest 10 or 100 on the number line
- 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
Use knowledge of number relationships to locate the position of a given whole number, up to 100, on an open number line.
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Use place value to describe whole numbers between 10 and 1,000 in terms of hundreds, tens, and ones, including written, standard, and expanded forms. Know that 10 is equivalent to 10 ones and 100 is equivalent to 10 tens.
- Add 10s and 100s (no regrouping)
- Add on a number line
- Add using groups of 10 and 100
- 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
- Regrouping whole numbers: 675
- Use place value blocks to show numbers 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
Find 10 more or 10 less than a given three-digit number. Find 100 more or 100 less than a given three-digit number.
Use objects to determine whether a number is even or odd.
Use place value understanding to round numbers to the nearest ten and nearest hundred (up to 1,000). Recognize when to round in real-world situations.
Use place value to compare and order whole numbers up to 1,000 using comparative language, numbers, and symbols (e.g., 425 > 276, 73 < 107, page 351 comes after page 350, 753 is between 700 and 800).
Use the relationship between addition and subtraction to generate basic facts with sums and minuends of up to 20.
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Demonstrate fluency with basic facts of addition and subtraction with sums and minuends of up to 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
Estimate sums and differences up to 100.
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Use strategies and algorithms based on knowledge of place value and equality to add and subtract two-digit numbers.
- 2-step subtraction word problems within 100
- Add 2-digit numbers by making tens
- Add using groups of 10 and 100
- Add within 100 using a number line
- Add within 100 using place value blocks
- Add within 20 visually
- Adding 2-digit numbers without regrouping
- Adding 53+17 by making a group of 10
- Adding four two digit numbers
- 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 word problem: horses
- Addition word problems within 100
- 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
- Subtract within 100 using place value blocks
- Subtract within 20 visually
- Subtracting 10s using place value
- Subtracting 1s using place value
- Subtracting a 1-digit number with regrouping
- Subtracting two-digit numbers without regrouping
- Subtraction word problem: crayons
- Subtraction word problems within 100
- Understanding place value when adding ones
- Understanding place value when adding tens
Solve addition and subtraction problems involving whole numbers up to two digits.
- 2-step addition word problems within 100
- 2-step subtraction word problems within 100
- Add & subtract within 20
- Add 2-digit numbers by making tens
- Add and subtract on the number line word problems
- Add and subtract within 20 word problems
- Add using groups of 10 and 100
- Add within 100 using a number line
- Add within 100 using place value blocks
- Add within 20
- Add within 20 visually
- Adding 2-digit numbers without regrouping
- Adding 53+17 by making a group of 10
- Adding 7 + 6
- Adding 8 + 7
- Adding by making a group of 10
- Adding four two digit numbers
- Adding multiple 2-digit numbers word problems
- Adding two digit numbers on a number line
- Adding up to four 2-digit numbers
- Adding up to four 2-digit numbers word problems
- Adding with regrouping
- Adding within 20 using place value blocks
- Adding within 20 using ten frames
- Addition and subtraction with number lines
- Addition and subtraction word problems: gorillas
- Addition and subtraction word problems: superheroes
- Addition word problem: horses
- Addition word problems within 100
- Break apart 2-digit addition problems
- Breaking apart 2-digit addition problems
- Find the missing number (add and subtract within 100)
- Length word problem example (US Customary)
- Length word problems
- Missing numbers in addition and subtraction
- Multi step addition word problem
- Multi-step subtraction word problem
- Select strategies for adding within 100
- Strategies for adding 2-digit numbers
- Subtract within 100 using a number line
- Subtract within 100 using place value blocks
- 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 10s using place value
- Subtracting 14 - 6
- Subtracting 1s using place value
- Subtracting a 1-digit number with regrouping
- Subtracting two-digit numbers without regrouping
- Subtraction word problem: basketball
- Subtraction word problem: crayons
- Subtraction word problems within 100
- Understanding place value when adding ones
- Understanding place value when adding tens
Use concrete models and structured arrangements, such as repeated addition, arrays, and ten frames to develop an understanding of multiplication.
Identify the parts of a set and area that represent fractions for halves, thirds, and fourths.
Construct equal-sized portions through fair sharing (length, set, and area models for halves, thirds, and fourths).
Determine the value of a collection of coins up to one dollar using the cent symbol.
Use a combination of coins to represent a given amount of money up to one dollar.