Class 7 Mathematics — Chapter 3: A Peek Beyond the Point

What you'll learn

• ▸Understanding Tenths as Fractional Units
• ▸Comparing and Ordering Numbers with Tenths
• ▸Addition of Numbers with Tenths
• ▸Subtraction of Numbers with Tenths
• ▸Understanding Hundredths for Greater Precision
• ▸Representing Numbers with Tenths and Hundredths
• ▸Addition of Numbers with Hundredths
• ▸Subtraction of Numbers with Hundredths
• ▸Connecting Fractional Operations to Whole Number Algorithms

Chapter Summary

--- PAGE 1 --- 3 A PEEK BEYOND THE POINT 0774CH03 3.1 The Need for Smaller Units Sonu's mother was fixing a toy. She was trying to join two pieces with the help of a screw. Sonu was watching his mother with great curiosity. His mother was unable to join the pieces. Sonu asked why. His mother said that the screw was not of the right size. She brought another screw from the box and was able to fix the toy. The two screws looked the same to Sonu. But when he observed them closely, he saw they were of slightly different lengths. Sonu was fascinated by how such a small difference in lengths could matter so much. He was curious to know the difference in lengths. He was also curious to know how little the difference was because the screws looked nearly the same. In the following figure, screws are placed above a scale. Measure them and write their length in the space provided. --- PAGE 2 --- A Peek Beyond the Point Between 2 cm and 3 cm More than 2 1/2 cm but less than 3 cm 2 7/10 c…

Practice Questions from this Chapter

Tap "Get Solution" on any question to ask our AI tutor.

1. Measure my finger with a ruler. Get Solution →
2. Explain everyday uses of decimals. Get Solution →
3. Name the smallest thing ever measured. Get Solution →
4. According to the chapter, how many equal parts is a unit length on the ruler divided into for measuring the screws? Get Solution →
5. How is the measurement 2 7/10 cm read aloud, as stated in the text? Get Solution →
6. As explained in Section 3.2, how many 'one-tenths' are required to make one whole unit? Get Solution →
7. When a unit is divided into smaller parts to represent hundredths, how many of these smaller parts make up one whole unit? Get Solution →
8. How many one-hundredths (1/100) are equal to one-tenth (1/10)? Get Solution →

Did you know?

• 💡 Ancient Egyptians measured with cubits, based on the length of an arm from elbow to fingertip.
• 💡 A nanometer is so small that a million of them would barely cross a human hair.
• 💡 The earliest known rulers, made of bronze, were discovered over 5,000 years ago.
• 💡 Honeybees can sense incredibly small changes in temperature, less than a tenth of a degree.
• 💡 The metric system, built on powers of ten, was introduced in France over 200 years ago.

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