2nd Grade Math

Add and subtract within 20

 Use properties of operations to add and subtract

•  Commutative property of addition: 8+3=11, so 3 +8 =11

• Associative property of addition: To add 2+6+4, the second two numbers can be added to make a ten, so 2+6+4= 2+10=12

Understand the meaning of an equal sign and determine if equations are true or false (e.g., 7=8-1, or 4+1=5+2)

Determine the unknown number in an equation (e.g., 8 + __ = 11,   5= ___ - 3) 

Count, read, and write numbers up to 120 from any number 

Compare two-digit numbers using <, >, and = symbols 

Add within 100 with a two-digit number and a one-digit number and a two-digit number, and a multiple of ten (e.g., 24+9, 27+40)

Subtract multiples of ten (e.g., 70 - 30) 

Tell and write time in hours and half hours using analog and digital clocks.

Practice dividing circles and rectangles into two and four equal shares, and describe the shares using the words halves, fourths, and quarters. 

List as many ways possible to find the sum of 20. List as many ways possible to find the sum of 15.

Write an addition story problem using animals.  

Write a subtraction story problem using family members.

Write five examples of a "flip flop" addition problem. (e.g., 2+5=7, 5+2=7)

How many letters are in your first and last name? Choose another family member and count how many letters are in their first and last name. Who has more letters? 

Keep track of the weather for two weeks.  How many days were sunny days? Cloudy days? Rainy days? How many more sunny days than rainy days?

Count out 37 objects (raisins, peanuts, candy, and cereal).  From the 37 objects, make a pile of 26 using your objects.  How many objects are left in your pile?

Take a walk outside with another family member.   Record how many dogs, cars, and flowers you see. Write a number sentence to show the total number of dogs, cars, and flowers you saw.

Draw a picture of 45+19 using place values (tens and ones). How did you add these two numbers?

Draw a number line beginning with 0. Place only the following numbers on your number line: 45, 25, 35, and 15. How did you decide where to place the numbers?

Draw two clock faces. Draw the hour hand and minute hand on the faces of the clocks to show what time you woke up and what time you will go to bed. 

Draw a picture of a cake, or use Play-Doh to make one. Practice splitting your cake into two and four equal pieces. If you split your cake between yourself and one family member, how much of the cake would each person get? What if you split the cake between yourself and three other family members? Practice with a rectangular cake as well.