We know that a mathematical expression uses mathematical symbols instead of words. For example, the words ‘twenty-eight increased by five’, will be shown as the mathematical expression 28 + 5. Can you give the mathematical expressions for these words? Seventy three minus forty -two Twelve less two Six times fifteen …
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This stamp has been stuck on centimeter-squared paper. Take each square to have a side of 1 cm. USING FORMULA
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A polygon is a simple figure formed by connecting line segments. These line segments do not cross each other. Triangles and quadrilaterals (rectangles, squares, etc.) are examples of polygons. TRIANGLES The word triangle means three angles. The given triangle has three angles ∠A, ∠B and ∠C. Points A, B and C are the …
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CHECK IN A protractor is used to measure angles. This angle is measured on the inner scale as the baseline arm point to 0° on the inner scale. The other arm crosses 50° showing that ∠ AOB = 50°. Angles are named according to their measures.
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Sometimes when we have a lot of information about things, it helps us to organize the information or data, as also called, Into graphs. Graphs also help us understand and use the information in a proper manner. Graphs are pictorial or diagrammatic representations of data. PICTOGRAPHS Pictograph use pictures or …
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PROFIT AND LOSS Mr Gupta makes very good rocking chairs. It coast him Rs. 795 to make one rocking chair. He sells it in his furniture shop at Rs. 900. Rs. 795 is the Cost Price (CP) of the chair. Rs. 900 is the Selling Price (SP) of the chair. …
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Anisha collects ancient coins. She has collected 100 coins of which 43 coins. We can express this in many ways. Using fractions we can say 43/100 of her coins are Indian coins. Using decimals we can say 0.43 coins of her collection are Indian coins. We can also express this …
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Yash is an artist trying to find the perfect shade of green for his new painting. He is mixing. He is mixing tubes of yellow and blue paint to find his ‘perfect’ green. Subtraction is one way to compare the quantities of yellow and blue paint that Yash used 2 …
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The place value of a digit decreases every time it move to the right. It gets ten times smaller for every move to the right. The Decimals point is always placed after the ones place. After the decimal point, the place values are tenths, hundredths, thousandths, … All these places …
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A faction shows a part of a whole. A whole can be region or a collection. You are familiar with these fractions. Like Fractions: Fractions that have same denominator are called like fractions, e.g., 3/7, 5/7, 1/7 Unlike fractions: Factions that have different denominators are called unlike fractions, e.g., 4/7, …
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Class Notes NCERT Solutions for CBSE Students