# Archives: Lessons

## Lesson 18- Problems Involving Decimals

Objective At the end of this lesson, students should be able to understand and solve word problems involving decimals. Decimal word problems are just like any other word problems except that they involve decimal numbers and not whole numbers. Example 1 Three cylinders weigh 52.4kg, 48.06kg and 63.587kg. What is the total weight of the …

## Lesson 17- Dividing a Decimal by a Decimal

Objectives At the end of this lesson, students should be able to divide a decimal number by another decimal. Consider the number line below. How many times is 0.4 contained in 1-2? We can see that 0.4 is contained in 1.2 three (3) times. The division methods can also be used to solve this question …

## Lesson 16- Dividing Decimals by Whole Numbers

Objective At the end of this lesson, students should be able to divide decimals by whole numbers. When dividing a decimal by a whole number, the normal method is used; however, the decimal point in the quotient is kept directly above the decimal point in the dividend.

## Lesson 15- Multiplying Decimals by Decimals

Objective At the end of this lesson, students should be able to multiply decimals by other decimals. When multiplying decimals by other decimals; any of these two methods may be used. Example 0.2 x 0.4                  b.  1.28 x 3.5 3.324 x 0.7               d.  4.568 x 0.75      Example a. 0.2 x 0.4                    b. 1.28 x …

## Lesson 14- Multiplying Decimals by Multiples of 10 or 100

Objective At the end of this lesson, students should be able to multiply decimals by multiples of 10 or 100. Decimals can easily be multiplied by multiples of 10 or 100. Example 1 a. 1.52 x 20                             b.  4.671 x 50 Solution a. 1.52 x 20 (20 = 10 x 2) First multiply the decimal …

## Lesson 13- Multiplying Decimals by Whole Numbers

Objectives: At the end of this lesson, students should be able to multiply decimals by whole numbers. Multiplying means continues addition. It implies adding a particular number to itself a number of times. The same rule applies when multiplying decimals by whole numbers. Consider the number line below. The number line shows four (4) jumps …

## Lesson 12- Dividing Decimals by 10, 100 or 1000

Objective At the end of this lesson, students should be able to divide decimals by 10, 100 or 1000. Remember from the previous lesson that, when you multiply a decimal number by: 10, each digit of the decimal moves one place to the left. 100, each digit moves 2 places to the left. 1000, each …

## Lesson11- Multiplying Decimals by 10, 100 Or 1000

Objective At the end of this lesson, students should be able to multiply decimal numbers by 10, 100 or 1000. Decimals can easily be multiplied by 10, 100 and 1000. Anytime a decimal is multiplied by 10, each digit of the decimal moves 1 place to the left. Example 1 a)m1.24 x 10                  b.  13.5 …

## Lesson10- Estimation of Decimals

Objective At the end of this lesson, students should be able to estimate the answers to questions involving addition and subtraction of decimals. An estimate is a rough guess. In this lesson, we will learn how to estimate decimals in addition and subtraction questions. To estimate a decimal, you may quickly round it to the …

## Lesson 9: Addition and Subtraction of Decimals

Objective At the end of this lesson, students should be able to: Add and subtract decimals with the same decimal places. Add and subtract decimals with different decimal places. Addition and subtraction of decimals follow the normal rules for adding and subtracting whole numbers. However, there are a few steps that must be followed when …

## Lesson 8- Rounding Decimals

Objective At the end of this lesson, students should be able round decimal numbers to the nearest whole number, tenth, hundredth or thousandth. Rounding a decimal means representing it by a number to which the decimal is nearest to. Rounding a decimal numbers allows us to write the number in a way to suit our …

## Lesson 7- Ordering Decimals

Objective At the end of this lesson, students should be able to arrange decimals in ascending or descending order. Ordering decimals means, arranging decimal numbers in an organized manner. Decimals can be arranged in ascending or descending order. With the knowledge from comparing decimals, you can identify the largest decimal number in a list, the …

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