Elementary School Lessons

ENERGY and LIGHT

1. __________ is the ability to do work
2. Examples of sources of heat and light energy sources: _________ and _________
3. ________________ is the heat and light from the sun

Click here for the reviewer.Grade 3 Science reviewer: Energy and Light

Grade 4 Math Reviewer: Ratio

Ratio

Write the ratio in two ways:

1.     5 books to 10 students

2.     A dozen eggs to 36 eggs

3.     3km to 2000m

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Grade 4 Math Reviewer: ratio

Angles

1.     A _______ is a part of as line that has one endpoint and extends infinitely in one direction.

2.     An _________ is made up of two rays having a common endpoint called vertex.

3.     A __________ is used to measure an angle

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Grade 4 Math: Angles Reviewer

1.     A ________ is an exact location in space that has no dimension

2.     A ________ is an infinite set of points that extends infinitely in both directions

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Grade4Math Basic Geometric Elements

Fill in the blanks:

1. A ___________ is a comparison of two quantities.

2. A ___________ is a comparison between two different quantities.

3. Two equal ratios form a _____________, where the product of the means is equal to the product of the extremes.

4. To change a fraction with a denominator of 100 to percent, drop the denominator and affix the ___________

5. To change the fraction whose denominator is not 100 to percent, write an equivalent fraction with a denominator of 100 then write this as ___________

6. To write a percent as a fraction, use 100 as the ________________ then reduce to lowest term.

7. To change a decimal to a percent, first change the decimal to a fraction with a denominator of _________. Then change the fraction to a percent.

8. To change a percent to a decimal, move the decimal point two places to the ____________ then drop the % sign.

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Grade 4 Math: Ratio.Proportion.Percentage reviewer

Greatest Common factor or GCF is the largest whole number that divides evenly into each of the numbers.

FACTORS are the numbers that you multiply to get another number. [ 3 X 5 = 15 where the factors are 3 and 5]

To get the greatest common factor, one can use two methods:

• First is to list all the factors of the given numbers. The list the common factors or the same factors for these given numbers. When this has been done, choose the biggest number among the common factors.

ex: 30 = 1, 2, 3, 5, 6, 10, 15, 30

20 = 1, 2, 4, 5, 10, 20

The common factors for 30 and 20 are 1,2, 5 and 10 therefore the greatest common factor is 10.

• Another method for finding the greatest common factor is listing down the prime factors. After listing the prime factors, multiply these prime factors.

PRIME FACTORS are numbers that can only be multiplied by 1 and itself [ex: 2,3,5,7,11…]

The prime factors for 30 are 5 x 3 x 2

The prime factors for 20 are 5 x 2 x 2

The prime factorization of 30 and 20 have one 5 and one 2 in common. Multiply these common prime factors and you get the greatest common factor.

5 x 2 = 10

Isulat ang PN kung pangungusap o PR kung parirala:

1. Nais kong mamasyal sa tabing-ilog.
2. Regalo ng aking Ina
3. Napakagandang bulaklak
4. Tulungan nating alagaan

complete reviewer to be updated soon…