Find here many important second grade math concepts taught in second grade. Teachers, parents, and math tutors can also use them as a guideline to illustrate a math lesson or to teach important skills that kids are supposed to know in second grade math.
Doubles In doubles, both addends are the same. 
1 + 1 = 2 2 + 2 = 4 

Groups have the same number of items. 
Estimate: No need to get an exact answer. Possible answer: 35, 40 or 30 
♥ ♥ ♥ ♥ 

12:00 a.m. : midnight. sleeping time 
Example of angle. 
Bar graph 
Array The array on the right is made with triangles. The array has 4 rows and 5 columns. 4 × 5 = 20 triangles 
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Array The array on the right is made with triangles. The array has 4 rows and 5 columns. 4 × 5 = 20 triangles 
▲ ▲ ▲ ▲ ▲ 
Associative property 
8 + 5 + 2 = (8 + 5) + 2 
Associative property 
8 + 5 + 2 = (8 + 5) + 2 
Even number 
Count back 
☺☺☺☺☺☺☺ ☺☺☺☺☺☺ 
Count back 
☺☺☺☺☺☺☺ ☺☺☺☺☺☺ 
1 Dollar 1 dollar = 100 cents 

Word form of number 
345: three hundred, fortyfive 
Odd number 
Quadrilaterals Quadrilaterals are closed figures with 4 straight sides. 
Standard form 
432 
Tens 
Vertex 


12:00 p.m. : noon. lunch time 
Line plot A line plot shows data on a number line using x or some other marks to show how many times a number appears. The number 6 appears 3 times. 

4 + 8 = 12 
Equation 
4 + 8 = 12 

4 is smaller than 8 or 4 < 8 8 is bigger than 4 or 8 > 4 

4 is smaller than 8 or 4 < 8 8 is bigger than 4 or 8 > 4 
Centimeter ruler
Centimeter or cm
1 meter = 100 centimeters
The length of a baseball bat is about 1 meter
The width of a finger or the diamater of a wedding ring is about 1 centimeter long
Count on 5 + 3 
☺☺☺☺☺ 
Count on 5 + 3 
☺☺☺☺☺ 
USA money 

Regroup Regroup 15 ones as 1 ten and 5 ones 
Pictograph Key of a pictograph. Each face = 1 player. 
Flat 

+5 +5 +5 
Sequence 
+5 +5 +5 
Place value The value of a digit based on where the digit is located. The place value of 4 in 546 is 40. 
Oct 22, 18 04:14 PM
Take a good look at these optical illusions with geometry
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Oct 22, 18 04:14 PM
Take a good look at these optical illusions with geometry
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