Math Flashcard

Front

What is multiplication?

Back

Multiplication is a mathematical operation that represents the repeated addition of a number. For example, 4 × 3 means adding 4 three times: 4 + 4 + 4 = 12.

Front

How do you find the total when adding multiple items?

Back

To find the total, you add the values of all items together. For example, if you have 3 apples and 2 oranges, the total is 3 + 2 = 5.

Front

What is the product of 5 and 6?

Back

The product of 5 and 6 is 30.

Front

How do you calculate the total cost of items?

Back

To calculate the total cost, multiply the price of each item by the quantity and then add the costs together.

Front

What does the term 'array' mean in multiplication?

Back

An array is a visual representation of multiplication using rows and columns. For example, a 3 by 4 array represents 3 rows of 4, which equals 12.

Front

What is the distributive property?

Back

The distributive property states that a(b + c) = ab + ac. It allows you to multiply a number by a sum by distributing the multiplication.

Front

How do you solve 23 × 42 using the box method?

Back

Break down 23 into 20 and 3, and 42 into 40 and 2. Then multiply: (20 × 40) + (20 × 2) + (3 × 40) + (3 × 2) = 920 + 40 + 120 + 6 = 1086.

Front

What is the importance of estimating in multiplication?

Back

Estimating helps you quickly check if your answer is reasonable. For example, estimating 23 × 42 as 20 × 40 gives you 800, which helps verify the actual answer.

Front

What is a rectangular array?

Back

A rectangular array is a way to organize objects in rows and columns to visualize multiplication. For example, a 3 by 5 array shows 3 rows of 5.

Front

How do you multiply a number by 10?

Back

To multiply a number by 10, simply add a zero to the end of the number. For example, 7 × 10 = 70.