Add and subtract within 100 to solve one- and two-step word problems. (2.OA.1)

Quarter 1, 2, and 3

Fluently add and subtract within 20 using mental strategies.
By the end of Grade 2, know all sums of two one-digit numbers. (2.OA.2)

Quarter 1, 2, 3, and 4

Determine odd or even numbers and write an equation to express an even number. (2.OA.3)

Quarter 1

Use addition to find the total number of objects in rows and columns. (2.OA.4)

Quarter 2

Vocabulary

Addition: To join two or more groups. 2 + 3 = 5

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.

Addend: A number that is added to another in an addition problem. In 2 + 3 = 5, 2 and 3 are addends.

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

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

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

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

Regroup: To exchange amounts of equal value to rename a number.

Decompose: To break a number into smaller parts to simplify computation. Example: 15 = 10 + 5.

Compose: To put decomposed numbers back together. 10 + 5 = 15.

Array: An arrangement that shows objects in rows and columns.

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.

Represent two digit numbers with popsicle sticks – make bundles of ten for the tens and use single sticks for the ones. Add the piles together.

Use small items (counters, beans, small toys) to represent number sentences. Use index cards to make +, -, <, >, and = symbols. Show a number sentence with a missing element: 7 + ___ = 12. Have your student find the missing addend.

Add the price of two items at a store.

Compare gas prices to find the lowest amount.

Roll a 2-digt number and subtract it from 99 or 100.

Start with 100 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.

Look for items that are in repeated sets or groups – panes in a window, pickets on a fence, sodas in a six-pack, wheels on cars or bicycles.

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

## What your student will learn?

By the end of Grade 2, know all sums of two one-digit numbers. (2.OA.2)

## Vocabulary

Addition:To join two or more groups. 2 + 3 = 5Subtraction: 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.Addend:A number that is added to another in an addition problem. In 2 + 3 = 5, 2 and 3 are addends.Difference:The answer to a subtraction problem. In 8 – 3 = 5, 5 is the difference.Sum:The answer to an addition problem. In 2 + 3 = 5, 5 it is the sum.Equal sign (=): A symbol used to show that two amounts have the same value.384 = 384

Number Sentence:A sentence that includes numbers, operation symbols ( +,- ), and a greater than or less than symbol ( >,< ) or equal sign. 5 + 3 = 8 25 < 32Regroup:To exchange amounts of equal value to rename a number.Decompose:To break a number into smaller parts to simplify computation. Example: 15 = 10 + 5.Compose:To put decomposed numbers back together. 10 + 5 = 15.Array: An arrangement that shows objects in rows and columns.## Activities At Home

## Learning Links

## Basic Fact Practice