Secondary School (English Medium) (5 to 8) कक्षा ८ - CBSE Question Bank Solutions

Express the following numbers in standard form:
0.000437 × 10⁴

Express the following numbers in standard form:
4 ÷ 100000

Write the following numbers in the usual form:
4.83 × 10⁷

Write the following numbers in the usual form:
3.02 × 10⁻⁶

Write the following numbers in the usual form:
4.5 × 10⁴

Write the following numbers in the usual form:
3 × 10⁻⁸

Write the following numbers in the usual form:
1.0001 × 10⁹

Write the following numbers in the usual form:
5.8 × 10²

Write the following numbers in the usual form:
3.61492 × 10⁶

Write the following numbers in the usual form:
3.25 × 10⁻⁷

Add the following algebraic expression:

3a²b, − 4a²b, 9a²b

Add the following algebraic expression:

\[\frac{2}{3}a, \frac{3}{5}a, - \frac{6}{5}a\]

Add the following algebraic expression:

 4xy² − 7x²y, 12x²y − 6xy², − 3x²y +5xy²

Add the following algebraic expression:

\[\frac{3}{2}a - \frac{5}{4}b + \frac{2}{5}c, \frac{2}{3}a - \frac{7}{2}b + \frac{7}{2}c, \frac{5}{3}a + \frac{5}{2}b - \frac{5}{4}c\]

Add the following algebraic expression:

\[\frac{11}{2}xy + \frac{12}{5}y + \frac{13}{7}x, - \frac{11}{2}y - \frac{12}{5}x - \frac{13}{7}xy\]

Add the following algebraic expression: \[\frac{7}{2} x^3 - \frac{1}{2} x^2 + \frac{5}{3}, \frac{3}{2} x^3 + \frac{7}{4} x^2 - x + \frac{1}{3}, \frac{3}{2} x^2 - \frac{5}{2}x - 2\]

Subtract:

− 5xy from 12xy

Subtract:

2a² from − 7a²

Subtract:

2a − b from 3a − 5b

Subtract:

2x³ − 4x² + 3x + 5 from 4x³ + x² + x + 6