Reciprocals ppt lesson 1
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A reciprocal in math is a number that is multiplied by another number to get the product of 1. Two numbers whose product is 1 are called reciprocal pairs. To find the reciprocal of a number, write the number as a fraction and flip the numerator and denominator. For whole numbers, write the number as a fraction first before flipping. To find the reciprocal of a mixed number, first write it as an improper fraction and then flip the numerator and denominator.
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The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive function. Exercise causes chemical changes in the brain that may help protect against mental illness and improve symptoms.
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This document discusses affixes, including prefixes and suffixes. It provides examples of common prefixes like anti-, de-, dis-, en-, and in- and their meanings. Some common suffixes are -able, -al, -ed, -en, -er, -est, -ful, -ic, -ing, -(t)ion, -(i)ty, -(t)ive, and -ly. Affixes are added to root words to modify or change their meaning. Knowing common prefixes and suffixes can help the reader understand new words and sounds more educated.
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Activities Affected by Natural Objects in the Sky.pptx
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Chapter-1
Introduction to objective, scope and outcome the subject
Chapter 2
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Chapter 3
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Levelling: Instrument used Object of levelling, Methods of levelling in brief, and Contour maps.
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Water Pollution: Water Quality standards, Introduction to Treatment & Disposal of Waste Water. Reuse and Saving of Water, Rain Water Harvesting. Solid Waste Management: Classification of Solid Waste, Collection, Transportation and Disposal of Solid. Recycling of Solid Waste: Energy Recovery, Sanitary Landfill, On-Site Sanitation. Air & Noise Pollution: Primary and Secondary air pollutants, Harmful effects of Air Pollution, Control of Air Pollution. . Noise Pollution Harmful Effects of noise pollution, control of noise pollution, Global warming & Climate Change, Ozone depletion, Greenhouse effect
Text Books:
1. Palancharmy, Basic Civil Engineering, McGraw Hill publishers.
2. Satheesh Gopi, Basic Civil Engineering, Pearson Publishers.
3. Ketki Rangwala Dalal, Essentials of Civil Engineering, Charotar Publishing House.
4. BCP, Surveying volume 1
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Reciprocals ppt lesson 1
- 1. Reciprocals
- 2. What is a reciprocal? Webster’s dictionary defines the word as “done, given, or felt equally on both sides”. Examples: The two countries made a reciprocal trade agreement. The two business partners had a reciprocal friendship based on respect for each other.
- 3. But what does the word reciprocal mean in math? A reciprocal in math is a number you multiply by so that the result is 1. Two numbers whose product is 1 are called reciprocal pairs.
- 4. Let’s look at some reciprocal pairs. Notice how when we multiply them, the product is 1. 5 and 1/5 26 and 1/26 1/9 and 9
- 5. Here’s more examples of reciprocal pairs. Again, notice how when we multiply them, the product is 1. 2/3 and 3/2 4/15 and 15/4 8/3 and 3/8
- 6. One last look at reciprocal pairs. You’re catching on!!! The product is 1! 2 ½ and 2/5 6 ⅗ and 5/33 7 ⅔ and 3/23
- 7. So, now that you know what reciprocals are – how do you find the reciprocal of a number? It’s so easy!!! When you hear reciprocal – think RE-FLIP-RO-CAL!!!
- 8. You think because you simply the fraction to get the reciprocal!
- 9. Let’s practice finding reciprocal – of some numbers. 4 15 1 6
- 11. What if it’s a whole number? Write the whole number as a fraction, then FLIP it! 7 33 whole number written as a fraction reciprocal
- 12. If it’s a whole number, write the whole number as a fraction, then FLIP it! 16 57 whole number written as a fraction reciprocal
- 13. Let’s review what we’ve learned so far. Write the reciprocal for each fraction or whole number. 2/5 5/2 4 1/2 2/1 or 2 6/10 1/3 10/6 3/1 or 3 1/4 12 55 47 1/12 1/55 1/47
- 14. Let’s review what we’ve learned so far. Find the missing fraction for each number sentence. 4 9 x = 1 ? 13 1 x?=
- 15. Let’s review what we’ve learned so far. Find the missing fraction for each number sentence. 1 5 x = 1 ? 70 1 x?=
- 16. There’s one more part to today’s lesson— What to do when finding the reciprocal of a mixed number? • Write the mixed number as an improper fraction • Flip the improper fraction 5 ⅓ = 16 3 Now FLIP the improper fraction: 3 16
- 17. Let’s practice finding the refliprocal of some mixed numbers. 10 6 1 8 2 7 3 5 4 Improper Fraction: Reciprocal
- 18. Let’s practice finding the refliprocal of some mixed numbers. 30 4 1 3 2 20 7 2 1 Improper Fraction: Reciprocal
- 19. Let’s review what we’ve learned so far. Find the missing fraction for each number sentence. 1 5 x = 1 ? 7 1 x ? = 4 3 10