Find here many important 4th grade math concepts taught in 4th 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 4th grade math.

Ray 


Which number can be read as six thousand, four hundred eightyseven? A. 64087 B. 6087 C. 6487 D. 8764 

Which number can be read as six thousand, four hundred eightyseven? A. 64087 B. 6087 C. 6487 D. 8764 
Proper fraction 

Benchmark fractions 
Congruent shapes Shapes are congruent when they have the same shape and size. 
Common denominator 

4 16 3 1 4 16 

4 16 3 1 4 16 

Arc 

Measure of an angle 
150 degrees

Equation 
1 + 12 = 13 20 = 9 + 11 
Equation 
4 + 6 = 10 1 + 12 = 13 20 = 9 + 11 
Tenth and hundredth Tenth: one of the equal parts when a whole is divided into 10 equal parts. 
Hundredths 



Put the following decimal in order from greatest to least. Answer : 
Mixed number 
Formulas 
Area = length x width Perimeter = 2 x length + 2 x width 
Circle 
Tenths 

Composite number 

Factor pairs A factor pair refers to a set of two numbers when multiplied will yield a specific product. 
(1,12), (2, 6), and (3, 4) 
Factor pairs A factor pair refers to a set of two numbers when multiplied will yield a specific product. 
(1,12), (2, 6), and (3, 4) 
Obtuse angle An angle bigger than 90 degrees 
Decimal 
10.50 5.25 61.0 0.40 .333 
Number line 
Reasonableness 
What is the product of 47 times 32? C. 2947 D. 8114 
Multiplicative comparison 
Peter has 5 times as many 
Multiplicative comparison 
Peter has 5 times as many tennis 
Perimeter Area = 6 x 2 = 12 

What is the value of b in the equation below? 

What is the value of b 


Pattern: 

Decompose a fraction 
3/5 = 1/5 + 1/5 + 1/5 
Decompose a fraction 
3/5 = 1/5 + 1/5 + 1/5 
Example of prime numbers 
7 13 
Decimal point 


3 + (2 + 4) x 5 

3 + (2 + 4) x 5 
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