NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 2: Fractions and Decimals - Problems and Solutions
Question 83

Question. 83

Atomic weights: Helium = 4.0030, Hydrogen = 1.0080, Oxygen = 16.0000. Find the differences:

(a) Oxygen – Hydrogen

(b) Oxygen – Helium

(c) Helium – Hydrogen

Answer:

(a) 14.9920

(b) 11.9970

(c) 2.9950

Detailed Answer with Explanation:

Subtract given values: (a) 16 – 1.0080 = 14.9920. (b) 16 – 4.0030 = 11.9970. (c) 4.0030 – 1.0080 = 2.9950.

NCERT Exemplar Solutions Class 7 – Mathematics – Unit 2: Fractions and Decimals – Problems and Solutions | Detailed Answers