Unit 1 Second Grade Math

What  does addition mean?

• adding something to something else
  1+9=10
• subtracting something from something else
  10-1=9
• rounding to the nearest number
  9  is almost 10
• the number you get when you subtract
  10-7=3

Tags

CCSS.1.OA.A.1

What does difference mean?

• the result of an addition problem
  4+4=8
• the result of a subtraction problem
  9-2=7

Tags

CCSS.7.NS.A.3

What does subtraction mean?

• add a number to another number to find the sum.
• take away a number from another number to find the difference.

Tags

CCSS.1.OA.A.1

What does SUM mean?

• the total amount
  9+9=18
• the difference between two numbers
  9-5=4

Tags

CCSS.5.OA.A.1

CCSS.5.OA.A.2

What does comparing mean?

• to determine if two are more numbers are greater than, less than, or equal to one another
• sum
• add
• subtract

Tags

CCSS.RL.1.3

CCSS.RL.2.1

CCSS.RL.4.3

CCSS.RL.5.3

CCSS.RL.K.3

Define distance

• the sum of two numbers
• how far apart two numbers are

Tags

CCSS.7.NS.A.1C

What is joining?

• Putting two or more numbers together
• Taking two or more numbers apart

Tags

CCSS.1.OA.A.1

What is separating?

• Putting two or more numbers together
• Taking two or more numbers apart

Tags

CCSS.1.OA.A.1

What does model mean?

• a drawing that represents the problem
• the difference 

Tags

CCSS.RI.2.7

CCSS.RI.3.7

CCSS.RI.4.7

CCSS.RL.2.7

CCSS.RL.3.7

What is a number sentence?

• A problem using only numbers.
• A problem written using words and numbers.

Tags

CCSS.2.OA.A.1