Here you will find many important 4th grade math concepts taught in 4th grade. Teachers, parents, and math teachers can also use it as a guide to illustrate a math lesson or teach key skills that children should know about in 4th grade math. Decimal notation for fractions beamA ray has an ending point where it begins and extends forever the other side. Add mixed numbers Compare fractions Read whole numbers What number can be read as six thousand, four hundred eighty-seven? A. 64087 B. 6087 C. 6487 D. 8764
 Read whole numbers What number can be read as six thousand, four hundred eighty-seven? A. 64087 B. 6087 C. 6487 D. 8764
 Right groupThe numerator is smaller than the denominatorImproper fractionThe numerator is greater than the denominator. Right triangleA right triangle has a right angle. Benchmark fractions in 4th grade mathFractions often used for estimation. Congruent shapes Shapes are congruent when they are the same shape and size. Common denominatorAre multiples of 3 3, 6, 9, 12th, fifteen, …Are multiples of 4 4, 8, 12th, 16, …The common denominator is the least common multiple, or 12. Subtraction algorithm 4 5 6 – 3 9 8____________ 4th16 4 5 6 – 3 9 8 ___________ 8th 314th16 4 5 6 – 3 9 8 __________ 0 5 8
 Subtraction algorithm 4 5 6 – 3 9 8 ________________ 4th16 4 5 6 – 3 9 8 ________________ 8th 314th16 4 5 6 – 3 9 8 ________________ 0 5 8
 Line of symmetry Protractor A used geometric tool Draw and measure angles arc An arc is part of a circle. The bow is shown in orange. Multiplication algorithm Angle measure The right angle measures 150 degrees 150 degrees
 equation A math theorem with equal signs. The equal sign separates the left side from the right side. The amount on the left side of the equation is always equal to the amount on the right side. 4 + 6 = 10 1 + 12 = 13 20 = 9 + 11
 equation A math theorem with equal signs. The equal sign separates the left side from the right side. The amount on the left side of the equation is always equal to the amount on the right side. 4 + 6 = 10 1 + 12 = 13 20 = 9 + 11
 Tenths and hundredths Tenth: one of the same parts when a whole is divided into 10 equal parts. Hundredths: one of the same parts when a whole is divided into 100 equal parts HundredthsThe hundredth place is shown in red. The 9 means that 9 parts out of 100 are colored. 8.29
 Cutting lines Compare decimal places Put the following decimal places in the order from largest to smallest.4.23 4.24 4.2 4.30 4.19 Reply :4.30 4.24 4.23 4.20 4.19
 Mixed numberA mixed number has 2 parts. First, it has an integer that is 2. Second, it has a fraction that is 4/5 FormulasArea and perimeter of a rectangle Area = length x width Circumference = 2 x length + 2 x width

## More 4th grade math concepts

 circleIn a circle, you can place points anywhere on the purple arc. These points are equidistant from the solid black point called the center. tenthThe tenth place is shown in red. The 2 means that 2 out of 10 parts are colored. 8th.29
 Composite numberA number with more than 2 factors. Factors of 8 are 1, 2, 4 and 8.8 is a composite number since it has 4 factors or 4 numbers as can divide it evenly 12, 9 and 8
 Factor pairs A pair of factors relates to a set of two numbers when multiplied result in a specific product. Factor pairs of 12 are (1,12), (2, 6), and (3, 4)
 Factor pairs A factor pair refers to a set of two numbers when multiplied to get a specific product. Factor pairs of 12 are (1,12), (2, 6), and (3, 4)
 Obtuse angle An angle greater than 90 degrees Decimal 10.50 5.25 61.0 0.40.333
 Series of numbersA straight line on which we put 0 and count numbers appropriatenessthere is no need to do the math. Instead Use estimate to Eliminate answers that are unreasonable.50 times 30 = 1500, So the answer is 1551 What is the product of 47 times 32? A. 4514 B. 1551 C. 2947 D. 8114
 Multiplicative comparison Peter has 5 times 4 = 20. Together they have 20 + 4 = 24 John has 4 tennis balls. Peter has 5 times as many Tennis Ball as John. How lots of tennis balls do they have together?
 Multiplicative comparison Peter has 5 times 4 = 20.Together they have20 + 4 = 24 John has 4 tennis balls. Peter has 5 times as much many tennis ball as John. How many tennis balls do they have together?

 scope Circumference = 2 x length + 2 x width = 2 x 6 + 2 x 2 = 12 + 4 = 16 Area = 6 x 2 = 12 Solve an equation What is the value of b in the equation below? 5 + b = 12 Since 5 + 7 = 12, b = 7
 1 ounce 2 or 3 strawberries depend on the size
 Template:What’s next Number in the list? 12 15 18
 Break down a fraction 3/5 = 1/5 + 1/5 + 1/5
 Break down a fraction 3/5 = 1/5 + 1/5 + 1/5
 Example of prime numbersA prime number is a number that has only 2 factors, 1 and the number itself. 7 is prime because only 1 and 7 can be multiplied to get 7 5, 7 and 13
 comma The decimal point is the point (.) Separating the whole number from the fraction in decimal notation. Equivalent fractions Order of operations 3 + (2 + 4) x 5 Make brackets 3 + 8 x 5 Perform multiplication 3 + 40 Add 43
 Order of operations 3 + (2 + 4) x 5 Make brackets 3 + 8 x 5 Perform multiplication 3 + 40 Add 43

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Make sure students understand most of the math skills taught above in 4th grade math. If you want to measure your understanding of the math skills taught in 4th grade math, please check out this 4th grade math test