Grade 1 study

What is addition?

Addition means putting two or more groups together to find how many in all. When you add 3 apples and 2 apples, you get 5 apples total.

What is subtraction?

Subtraction means taking away from a group to find how many are left.. Start with a pile. Take some away. Count what stays. That is subtraction.

Is this true? A sum is not the answer you get when you add two or more numbers together.

No. A sum is the answer you get when you add two or more numbers together. In 3 + 4 = 7, the number 7 is the sum.

What is a difference in math?

A difference is the answer you get when you subtract one number from another. In 9 − 4 = 5, the number 5 is the difference.

What is an equation?

An equation is a number sentence that uses an equal sign to show that two sides have the same value.. Both sides of = must be the same amount. 3 + 2 = 5 is an equation.

Is this true? The equal sign (=) means 'the same as.' It tells you that the amount on the left side is the same as the amount on the right side.

Yes. Read = as the same as. Check each side. If they match, it is true.

Match each prompt to its fact.

What is addition? → Addition means putting two or more groups together to find how many in all.; What is subtraction? → Subtraction means taking away from a group to find how many are left.; What is a sum? → A sum is the answer you get when you add two or more numbers together.; What is a difference in math? → A difference is the answer you get when you subtract one number from another.

Put these ideas in lesson order.

addition → subtraction → sum → difference