Add and subtract within 20 to solve word problems. (1.OA.1)

Quarter 1 and 4

Add three whole numbers to solve word problems. (1.OA.2)

Quarter 3

Use properties of operations to add and subtract. (1.OA.3)

Quarters 1, 2, 3, and 4

Understand subtraction as an unknown-addend problem. (1.OA.4)

Quarters 1, 2, 3, and 4

Relate counting on or back to addition and subtraction. (1.OA.5)

Quarters 1 and 2

Add and subtract within 20 and fluently within 10. Use strategies to add and subtract. (1.OA.6)

Quarters 1, 2, 3, and 4

Understand the meaning of the equal sign and determine if equations are true. (1.OA.7)

Quarters 1 and 2

Find the missing number in an addition or subtraction equation. (1.OA.8)

Quarters 3 and 4

Vocabulary

Addition: To join two or more groups. 2 + 3 =

Subtraction: To find the difference when two groups are compared or to find out how many are left when items are taken away from a group.

Equation: a mathematical statement containing an equal sign, to show that two expressions are equal

Addend: Any numbers being added together (Example: 3 + 4 = 7, 3 and 4 are the addends)

Count On: start from any given number and count forward

Count Back: start from any given number and count backwards

Equal sign (=): A symbol used to show that two amounts have the same value.
384 = 384

Sum:The answer to an addition problem. In 2 + 3 = 5, 5 it is the sum.

Difference: The answer to a subtraction problem. In 8 – 3 = 5, 5 is the difference.

Number Sentence: A sentence that includes numbers, operation symbols ( +,- ), and a greater than or less than symbol ( >,< ) or equal sign. 5 + 3 = 8 25 < 32

Activities At Home

Roll single digit numbers and add them together.

Roll 2-digit or 3-digit numbers and add them together.

Add all the digits of your house number together.

Make a train with Legos or colored blocks. Write a number sentence for the different colors in the train.

Add the price of two items at a store.

Compare gas prices to find the lowest amount.

Start with 20 counters (beans, pennies, etc.) and roll two dice to make a 2-digit number. Subtract counters until you get to 0.

Give your student an addition or subtraction number sentence and ask them to make up a story problem to go with the number sentence.

Make a physical array with counters and record on paper using symbols.

## What Your Child Will Learn

## Vocabulary

Addition:To join two or more groups. 2 + 3 =Subtraction: To find the difference when two groups are compared or to find out how many are left when items are taken away from a group.Equation:a mathematical statement containing an equal sign, to show that two expressions are equalAddend:Any numbers being added together (Example: 3 + 4 = 7, 3 and 4 are the addends)Count On:start from any given number and count forwardCount Back:start from any given number and count backwardsEqual sign (=): A symbol used to show that two amounts have the same value.384 = 384

Sum:The answer to an addition problem. In 2 + 3 = 5, 5 it is the sum.Difference:The answer to a subtraction problem. In 8 – 3 = 5, 5 is the difference.Number Sentence:A sentence that includes numbers, operation symbols ( +,- ), and a greater than or less than symbol ( >,< ) or equal sign. 5 + 3 = 8 25 < 32## Activities At Home

## Learning Links