4th Grade OST Review Packet #2

Front

What is subtraction?

Back

Subtraction is the mathematical operation of finding the difference between two numbers. It is represented by the minus sign (-). For example, in the equation 5 - 3 = 2, 2 is the difference.

Front

What is the process to add fractions with different denominators?

Back

To add fractions with different denominators, first find a common denominator. Then, convert each fraction to an equivalent fraction with that common denominator, and finally, add the numerators.

Front

What is an equivalent fraction?

Back

Front

How do you convert a fraction to an equivalent fraction with a different denominator?

Back

Front

What is multiplication?

Back

Multiplication is a mathematical operation that represents the repeated addition of a number. It is represented by the multiplication sign (×). For example, 3 × 4 means adding 3 four times: 3 + 3 + 3 + 3 = 12.

Front

What is the formula to find the weight of an object if you know the weight of a similar object?

Back

If one object weighs a certain amount and another object weighs a multiple of that amount, you can find the weight of the second object by multiplying the weight of the first object by that multiple. For example, if a bicycle weighs 30 pounds and a car weighs 90 times as much, the car weighs 30 × 90 = 2700 pounds.

Front

What is the sum of two numbers?

Back

The sum of two numbers is the result of adding them together. For example, the sum of 3,950 and 405 is 4,355.

Front

What is a fraction?

Back

Front

What does it mean to find the difference between two numbers?

Back

Finding the difference between two numbers means subtracting the smaller number from the larger number. For example, the difference between 5314 and 4983 is 5314 - 4983 = 331.

Front

What is the importance of having a common denominator when adding fractions?

Back

Having a common denominator is important when adding fractions because it allows you to combine the numerators directly. Without a common denominator, you cannot accurately add the fractions.