# 1st Grade Math

## What do I need to know about my childâ€™s education?

Students should be able to demonstrate the following math abilities by the end of first grade. Many skills are worked on throughout the year and build on each other.

### Know basic number concepts

- Count to 120 starting at any number. Read and write numbers to 120.
- Understand place value (ex. 24 is made up of 2 tens and 4 ones).
- Use the symbols for greater than (>), equal (=) and less than (<) to compare two numbers up to 100.

### Add and subtract with single digit numbers

- Solve simple word problems involving adding and subtracting, like “Mary has 5 beach stones. She finds 4 more. How many beach stones does Mary have altogether?” Use objects or drawings at first.
- Write equations to represent problems, such as 5 + 4 = ?
- Know all the addition facts that add to 10 or less. Know the related subtraction facts.
- Solve addition and subtraction problems within 20 by using objects and strategies. For example, the problem “There are 15 ducks on a pond. 6 fly away. How many are left on the pond?” can be solved by counting down from 15, or by knowing how to take 5 away to get 10, then taking 1 more away to get 9.
- Solve problems where the amount that is added to or taken away is not known, such as “Tom has 7 toy cars. He gets some more for his birthday. Now he has 12 toy cars. How many did he get for his birthday?” (7 + ? = 12)

### Add and subtract some two-digit numbers

- Add a two-digit number and a ten, such as 35 + 30, or a two digit number and a one-digit number such as 35 + 3 or 35 + 8, using objects and strategies.

### Measurement and geometry

- Arrange three objects by length.
- Measure lengths of objects by using a smaller standard object.
- Tell and write time in hours and half-hours on digital clocks and clocks with hands.
- Make and read bar graphs to represent simple data.
- Recognize shapes (rectangles, squares, triangles) and put together several shapes to make new shapes.