CBSE Class 7 Mathematics — Flashcards for Quick Revision

A: One lakh = 1,00,000 (1 followed by 5 zeros). It represents 100 thousand or 10 × 10 × 10 × 10 × 10.

A: One crore = 1,00,00,000 (1 followed by 7 zeros). It represents 100 lakhs or 10 million.

A: 100 lakhs = 1 crore. This is because 1 crore = 1,00,00,000 and 1 lakh = 1,00,000, so 1,00,00,000 ÷ 1,00,000 = 100.

A: An arithmetic expression is a mathematical phrase that contains numbers and operations like addition, subtraction, multiplication, and division. Examples: 13+2, 20-4, 12×5, 18÷3. Every arithmetic expr

A: The equality sign '=' shows the relationship between an arithmetic expression and its value. For example: 13+2=15 means the expression 13+2 has the value 15.

A: We compare expressions based on their values using '=', '<', and '>' signs. For example: 10+2 > 7+1 because the value of 10+2 is 12, which is greater than the value of 7+1, which is 8.

A: We need smaller units to measure objects more accurately when the difference between measurements is very small. For example, two screws that look identical may have slightly different lengths that ca

A: A tenth part is created when we divide one unit into 10 equal parts. Each part is 1/10 of the unit. Ten tenths make one whole unit. It is written as 1/10 in fraction form and 0.1 in decimal form.

A: 27/10 is read as 'two and seven-tenths' or 'twenty-seven tenths'. It equals 2 + 7/10, which means 2 whole units and 7 tenth parts.