1st Grade Math
Fundamental mathematics concepts for first grade students including basic arithmetic, counting, and number sense.
Basic Subtraction
Taking Away
Subtraction means taking some away to see how many are left. We use the minus sign (−) for subtraction.
How Subtraction Works
If you have 5 cookies and eat 2, you subtract 2 from 5 to find out how many are left.
Ways to Subtract
- Use fingers to take some away
- Draw pictures and cross out
- Use number lines to count backward
Subtraction Sentences
A subtraction sentence looks like this: \( 7 - 3 = 4 \). The number you start with is called the minuend, the number you take away is the subtrahend, and the answer is the difference.
Real-World Connections
Subtraction helps you know how many pieces are left after sharing, or how much money you have after buying something.
Key Formula
\[a - b = c\]
Examples
Eating 2 candies from a pile of 6: 6 - 2 = 4.
Giving 1 sticker away from 5: 5 - 1 = 4.
In a Nutshell
Subtraction means taking some away to find out what is left.