Middle School Courses

What are Roman Numerals?

Roman Numerals Roman Numerals & How They Began   Historians believe Roman Numerals began as a tally system. Shepherds on the hills and in the fields around Rome would cut marks into sticks to keep track of how many sheep or goats were in their care.   Each animal was counted then recorded on a […]

5th Grade, Module 12: What is a Bill in Math?

BILL of Purchase a.k.a BILL By reading the chapter’s name the very first thing comes to our mind is the money we pay. When we go to restaurants, purchase grocery for home or buy stationary for school, we pay the bill at the end. Bills are an important element in our life. In this chapter we will […]

5th Grade, Module 11: What is the Unitary Method?

UNITARY METHOD   Unitary method is the most basic application used in our everyday life. This is because its application is based on variations. It does not have any formula. It is about the concept and the proper use of addition and multiplication. There are two types of variations: Direct variations and indirect variations. In […]

How Do You Round Off Numbers?

Rounding off Numbers   Rounding off a number to nearest tens When we round off the units place it is called estimating a number to nearest tens.  If the number at units place is below 5, it is rounded off to 0 i.e. the lower tens. If the number at units place is greater than or […]

5th Grade, Module 10: What is Simple Interest?

SIMPLE INTEREST   When we see “4% interest on car loans”, “3% EMI rate”, etc. on banners or in advertisements, that 4% and 3% is called the interest. There are two branches of calculating interest: Simple Interest and Compound Interest. In this chapter, we will study only simple interest.  Simple interest is as important chapter […]

5th Grade, Module 6: More on Number Systems and Rounding?

More about Numbers   There exist other number systems as well, apart from Hindu-Arabic (the one we use in general). One such commonly used number system is the Roman numeral system. In this chapter, we will learn to read, write and convert numbers from Hindu-Arabic to Roman numerals and vice-versa. show how the Roman numeration system is […]

How do you Divide Large Numbers?

Division of Large Numbers    Division of two numbers can be treated as repeated subtraction. It is subtracting the smaller number from the greater number repeatedly till you reach zero or get a remainder.   Examples-   (a)        20 ÷ 4 = 5 20 – 4 – 4 – 4 – 4 – 4 = 0 i.e. by 5 times subtracting 4 from 20.   […]

How do you Add or Subtract Decimals?

Addition and Subtraction of Decimals   Addition  Adding decimals is a simple and same method of adding any other number. To add decimals, we follow these steps: Convert the given decimals to like decimals Write the decimals in column in alignment with their place value such that decimal points are below each other and also […]

What is Profit or Loss in terms of Percentage?

Profit or Loss in Percentages?   We can define profit or loss in two ways- In terms of absolute amount- This is the method we studied just now where profit or loss is defined in monetary value.   In terms of percentage- This is the method we will study now where profit or loss is defined as […]

How do you Group and Order Like and Unlike Decimals?

Grouping and Ordering of Decimals Like and Unlike Decimals Decimals places: The number of digits in the fractional/ decimals part of a decimal number gives the number of decimal places. Examples:  (i) 5.76 has two decimal places (ii) 23.458 has three decimal places (iii)0.95 has two decimal places. Like Decimals: Like decimals refers to the […]