Mathematics. I plus you, together makes two Mathematics! I plus you, together makes two! Together we can solve word problems and become friends with… MATH! 1.OA.1 Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem

4+6=10 +Addition 1+9=10 2+8=10 3+7=10 4+6=10 5+5=10 6+4=10 7+3=10 8+2=10 9+1=10 4+6=10

10- =8 2 -Subtraction 10-1=9 10-2=8 10-3=7 10-4=6 10-5=5 10-6=4 10-7=3 10-8=2 10-9=1 2

Word Problems Example 1: Word Problems are equations that are formulated in sentences. These contain real world situations that you will soon be able to solve in everyday life. You have 2 apples at home and need 4 for dinner with your family. How many should you buy at the store?

https://youtu.be/DtiVarEGkbY Video

Example 1: Lucy has four cookies and Marco has one. How many cookie do they have together? 4+1=5

Example 2: 1-1=0 Marco had one cookie and Lucy eats it. How many does Marco have left over?

Step 1: Draw Picture Step 2: Write Equation Step 3: Solve Equation Example 3: Lisa begins the day with 15 pencils and ends with 3. How many pencils were lost?

Lisa begins the day with 15 pencils and ends with 3 Lisa begins the day with 15 pencils and ends with 3. How many pencils were lost? 1 Beginning of Day: End of Day: 15-p=3 15= Lisa’s pencils at beginning of day P= Lisa’s lost pencils 3= Lisa’s pencils at the end of the day 2

3 15-p=3 15-3= 12 Lisa lost 12 pencils. Lisa begins the day with 15 pencils and ends with 3. How many pencils were lost?

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