Examples for

Common Core Math: Grade 1: Numbers in Base Ten

In first grade, students define the 1s and 10s places of two-digit numbers. Using place value, students compare two-digit numbers and add numbers up to one hundred. In particular, students gain fluency with adding and subtracting multiples of 10 and adding a one-digit number to a two-digit number. Students use concrete models and visual representations to organize their thinking.
Common Core Standards

Get information about Common Core Standards.

Look up a specific standard:

CCSS.Math.Content.1.NBT.A.1
first grade common core standard NBT.B.2

Search for all first grade standards in a domain:

first grade number and operations in base ten common core standards
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Counting

Count up to 120.

Read the name of a number (CCSS.Math.Content.1.NBT.A.1):

number name 74
number name 112
98 in words

Count between any two numbers (CCSS.Math.Content.1.NBT.A.1):

count from 1 to 28
50 to 65
counting by ones from 110 to 120
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Place Value

Determine the place value of a digit based on its position in a number.

Describe the place values of a number (CCSS.Math.Content.1.NBT.B.2):

place value of 10
place value of the digit 4 in 42
place values of 18

Compare the magnitudes of numbers (CCSS.Math.Content.1.NBT.B.3):

is 13 greater than 12?
which is smaller, 18 or 22?
compare 17 and 27
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Addition & Subtraction

Perform addition and subtraction.

Add whole numbers (CCSS.Math.Content.1.NBT.C.4):

15 + 3
42 + 20
add 24 to 8
40 plus 15

Add or subtract 10 from a number (CCSS.Math.Content.1.NBT.C.5):

88 - 10
subtract 10 from 52
add 10 to 23

Subtract with multiples of 10 (CCSS.Math.Content.1.NBT.C.6):

50 - 30
subtract 30 from 40
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