What's

In this unit, students students use addition and subtraction within 20 to solve word problems involving unknowns in all positions. They will solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20. Students will demonstrate fluency for addition and subtraction within 20.

* Use addition and subtraction within 20 to solve word problems of all types with the unknown in all positions.

* Solve word problems adding three whole numbers whose sum is less than or equal to 20 using equations with a symbol for the unknown number.

* Add and subtract within 20, demonstrating fluency for subtraction within 10 using strategies such as counting on, making 10, decomposing a number leading to a 10, using the relationship between addition and subtraction, and creating equivalent but easier or known sums.

What's

In this unit, students students read, write, represent and compare numbers to 120. Students add two digit numbers plus one-digit numbers or multiples of 10, within 100 using models, drawings and strategies. Students subtract multiples of 10 from multiples of 10 in the range of 10-90 using models and strategies and explain their reasoning.

* Count to 120, starting at any number less than 120.

* Read and write numerals to 120.

* Represent a number of objects with a written numeral.

* Add a two-digit number nd a one-digit number within 100 using models, drawings, and strategies.

* Add a two-digit number and a multiple of 10, within 100 suing models, drawings, and strategies.

* Subtract multiples of 10 in the range of 10-90 from multiples of 10 in the range of 10-90.

* Relate computational strategies to a written method and explain the reasoning used.

* Compare two 2-digit numbers and record the results of the comparisons using correct mathematical symbols ( <,>,or =).

**new**in math?__Strategically Solve Addition and Subtraction Problems within 20__In this unit, students students use addition and subtraction within 20 to solve word problems involving unknowns in all positions. They will solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20. Students will demonstrate fluency for addition and subtraction within 20.

**Common Core Focus:*** Use addition and subtraction within 20 to solve word problems of all types with the unknown in all positions.

* Solve word problems adding three whole numbers whose sum is less than or equal to 20 using equations with a symbol for the unknown number.

* Add and subtract within 20, demonstrating fluency for subtraction within 10 using strategies such as counting on, making 10, decomposing a number leading to a 10, using the relationship between addition and subtraction, and creating equivalent but easier or known sums.

What's

**ahead**in math?__Adding to 100 and Subtracting Multiples of 10__In this unit, students students read, write, represent and compare numbers to 120. Students add two digit numbers plus one-digit numbers or multiples of 10, within 100 using models, drawings and strategies. Students subtract multiples of 10 from multiples of 10 in the range of 10-90 using models and strategies and explain their reasoning.

**Common Core Focus:*** Count to 120, starting at any number less than 120.

* Read and write numerals to 120.

* Represent a number of objects with a written numeral.

* Add a two-digit number nd a one-digit number within 100 using models, drawings, and strategies.

* Add a two-digit number and a multiple of 10, within 100 suing models, drawings, and strategies.

* Subtract multiples of 10 in the range of 10-90 from multiples of 10 in the range of 10-90.

* Relate computational strategies to a written method and explain the reasoning used.

* Compare two 2-digit numbers and record the results of the comparisons using correct mathematical symbols ( <,>,or =).

**Addition and Subtraction within 10**

**The children have been working hard learning strategies to help them solve addition and subtraction problems within 10. By the end of first grade, children should be able solve all problems within 10 in three seconds a problem. In order to help the children learn how to do this, the problems are broken down in strategies. You may have heard your child use the words: "ten friend" , "double", or "counting on". Below is a description of each strategy the children are learning:**

**Count on 1, 2, 3:**

**When adding two numbers, put the larger number in your head and count on 1, 2, or 3. You may have to change the order of the addends to do this. 6+3=(6... 7, 8, 9), 2+7=(7...8,9)**

**Count Back 1, 2, 3:**

**Put the whole in your head and count back. 9-2= (9...8,7)**

**Count On "Think Addition" :**

**When subtracting and the numbers are close start with the small number and count on to the large number to get the difference.. 9-7= (7...8,9 your answer is 2)**

**Doubles**

**:**

**Adding a number to itself. 2+2=, 4+4=, also knowing if 4+4=8, then 8-4=4.**

Near Doubles or Doubles +1:

When adding two numbers that are one apart (or number neighbors) double the small number and add one to the answer. 4+3=, double the 3 and add 1 to the answer. 3+3=6, so 4+3=7.

Near Doubles or Doubles +1:

When adding two numbers that are one apart (or number neighbors) double the small number and add one to the answer. 4+3=, double the 3 and add 1 to the answer. 3+3=6, so 4+3=7.

**Ten Friends:**

**Two numbers when added together equal 10. 4+6=10, 8+2=10**

Also knowing when 10 is the whole and you take away a part, the missing part is the ten friend. 10-7=3.

Below are addition and subtraction strategy flashcards. Some strategies will be introduced as we move on in the year. Feel free to copy at your convenience!

Also knowing when 10 is the whole and you take away a part, the missing part is the ten friend. 10-7=3.

Below are addition and subtraction strategy flashcards. Some strategies will be introduced as we move on in the year. Feel free to copy at your convenience!

addition_strategies.pdf | |

File Size: | 32 kb |

File Type: |

subtraction_strategies.pdf | |

File Size: | 29 kb |

File Type: |

What is

Children work with a partner to play a math game.

Children work independently to build with manipulatives, or play a math game involving manipulatives.

Children read math books or work on math facts independently.

Children play math games independently.

Children work with a parent or teacher on a particular task or they work

independently on a task.

**B.U.I.L.D.**?**B.U.I.L.D**. is our structured center math time which we have daily.**B = Buddy Games**Children work with a partner to play a math game.

**U = Using Manipulatives**Children work independently to build with manipulatives, or play a math game involving manipulatives.

**I = Independent Work**Children read math books or work on math facts independently.

**L = Learning About Numbers**Children play math games independently.

**D = Doing Math**Children work with a parent or teacher on a particular task or they work

independently on a task.