Question 2 - Figure it out - Page 93, 94, 95 - Chapter 4 Class 7 - Another Peek beyond the Point (Ganita Prakash II)

Transcript

Question 2 Write the decimal number at the arrow mark:Let’s do it one by one First Number Line There are 10 divisions between 3.1 and 3.2 Now, 1 division = (𝟑.𝟐 − 𝟑.𝟏)/𝟏𝟎 = 0.1/10 = 0.1 × 1/10 = 1/10 × 1/10 = 1/100 = 0.01 So, 2nd marking = 3.1 + 0.01 = 3.10 + 0.01 = 3.11 So, the markings are 3.10, 3.11, 3.12, 3.13, … 1 division = (𝟑.𝟐 − 𝟑.𝟏)/𝟏𝟎 = 0.1/10 = 0.1 × 1/10 = 1/10 × 1/10 = 1/100 = 0.01 So, 2nd marking = 3.1 + 0.01 = 3.10 + 0.01 = 3.11 So, the markings are 3.10, 3.11, 3.12, 3.13, … So, the markings are 3.10, 3.11, 3.12, 3.13, … And, the arrow is pointed at 3.16 Second Number Line There are 10 divisions between 3.1 and 3.2 Now, 1 division = (𝟐.𝟏𝟕 − 𝟐.𝟏𝟓)/𝟏𝟎 = 0.02/10 = 0.02 × 1/10 = 2/1000 = 0002/1000 = 0.002 So, 2nd marking = 2.15 + 0.002 = 2.150 + 0.002 = 2.152 So, the markings are 2.150, 2.152, 2.154, 2.156, … And, the arrow is pointed at 2.162