Mental Calculation Contest

Front

What is the sum of 56 + 78 + 112?

Back

246

Front

What is the result of 30² - 10²?

Back

800

Front

Calculate (42×8)+((56÷8)^2)−(15+25)×3.

Back

265

Front

What is 999 ÷ 3 - 33?

Back

300

Front

What is 1000 - (30 - 20)³?

Back

0

Front

Define mental calculation.

Back

Mental calculation is the process of performing arithmetic operations in one's head without the use of calculators or paper.

Front

What is the order of operations in mathematics?

Back

The order of operations is a set of rules that determines the sequence in which calculations are performed: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

Front

What is the square of a number?

Back

The square of a number is the result of multiplying that number by itself.

Front

What does it mean to divide a number?

Back

Dividing a number means splitting it into equal parts or groups.

Front

What is the cube of a number?

Back

The cube of a number is the result of multiplying that number by itself twice (number × number × number).