Grade 1 math

Units

1. 1

   Adding and subtracting within 20

   6 lessons

   1. Word problems within 20Solve stories up to 20 where things are added, taken away, put together or compared, with a drawing and a number sentence, and say what the answer counts.
   2. Adding three numbersAdd three numbers whose total is at most 20 by finding two to add first, and solve stories that join three groups.
   3. Properties of additionSee that 4 + 7 and 7 + 4 make the same total, and that three numbers can be added in any order, so you can start with the easy part.
   4. Subtraction as a missing addendSolve a take-away like 10 − 8 by asking what number added to 8 makes 10, and check it by adding.
   5. Counting on and backAdd by counting on from the bigger number, take away by counting back, and see that hopping up adds and hopping back takes away.
   6. Fluency within 10 and make-a-tenKnow adding and take-away facts up to 10 by heart, and make a ten to add and take away up to 20.
2. 2

   The equal sign and missing numbers

   2 lessons

   1. The equal signKnow that the equal sign means "is the same amount as", and tell whether number sentences like 7 = 8 − 1 are true or false.
   2. Finding the missing numberFind the missing number in an adding or take-away number sentence, wherever the box is, and check it.
3. 3

   Counting to 120

   1 lesson

   1. Counting to 120Count to 120 starting at any number, and read and write the numbers, using the pattern of tens.
4. 4

   Tens and ones

   5 lessons

   1. Tens and onesSee that 10 is a bundle of ten ones, that a number like 47 is some tens and some ones, and read its digits as tens and ones.
   2. Comparing two-digit numbersCompare two numbers like 47 and 39 by their tens first, then their ones, and write >, = or < to show which is greater.
   3. Adding within 100Add a small number, or a tens number like 20, to a number like 34, using tens and ones.
   4. Ten more and ten lessFind ten more and ten less than a number like 34 in your head by changing only the tens digit.
   5. Subtracting multiples of tenTake a tens number away from a tens number, like 80 − 30, by taking tens from tens.
5. 5

   Measuring length

   2 lessons

   1. Ordering objects by lengthPut three things in order from shortest to longest, and use a helper, like a string, to compare two things that cannot be put side by side.
   2. Measuring with length unitsSay how long something is by counting same-size pieces laid end to end, with no gaps and none on top of each other.
6. 6

   Time and data

   2 lessons

   1. Telling timeTell and write the time to the hour and half hour on a clock with hands and on a digital clock.
   2. Organizing and reading dataSort answers into up to three groups, show the counts in a table and a bar picture, and tell how many in each group, how many in all and which has more.
7. 7

   Shapes and equal parts

   3 lessons

   1. Defining and non-defining attributesTell what makes a shape what it is, like how many sides it has and being closed, from what does not matter, like color and size, and draw shapes from clues.
   2. Composing shapesPut flat shapes together to make a new shape, and put solid shapes together to make a bigger one.
   3. Halves and fourthsCut circles and rectangles into two or four equal shares, call them halves, fourths and quarters, and see that more shares make smaller pieces.