Common Core math · ages 6–7
Grade 1 math video lessons
Word problems within 20, the equal sign, tens and ones, adding within 100, length, time and graphs.
Operations & Algebraic Thinking
6 lessons · 28 minWord problems within 20, strategies like making ten, the meaning of the equal sign, and fluency within 10.
Number & Operations in Base Ten
5 lessons · 18 minCounting to 120, tens and ones, comparing two-digit numbers, and adding and subtracting with tens.
Measurement & Data
4 lessons · 17 minComparing and measuring length with units, telling time to the half hour, and making simple graphs.
Geometry
1 lesson · 3 minWhat makes a shape a shape: defining attributes versus colour, size and which way it is turned.
What Grade 1 math covers
- 1.OA.A.1 Use addition and subtraction within 20 to solve word problems.
- 1.OA.B.3 Apply properties of operations as strategies to add and subtract.
- 1.OA.B.4 Understand subtraction as an unknown-addend problem.
- 1.OA.C.5 Relate counting to addition and subtraction.
- 1.OA.C.6 Add and subtract within 20, demonstrating fluency.
- 1.OA.D.7 Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false.
- 1.NBT.A.1 Count to 120, starting at any number less than 120.
- 1.NBT.B.2 Understand that the two digits of a two-digit number represent amounts of tens and ones.
- 1.NBT.B.3 Compare two two-digit numbers based on meanings of the tens and ones digits.
- 1.NBT.C.4 Add within 100, including adding a two-digit number and a one-digit number.
- 1.NBT.C.6 Subtract multiples of 10 in the range 10-90 from multiples of 10 in the range 10-90.
- 1.MD.A.1 Order three objects by length; compare the lengths of two objects indirectly by using a third object.
- 1.MD.A.2 Express the length of an object as a whole number of length units.
- 1.MD.B.3 Tell and write time in hours and half-hours using analog and digital clocks.
- 1.MD.C.4 Organize, represent, and interpret data with up to three categories.
- 1.G.A.1 Distinguish between defining attributes versus non-defining attributes.
Standards in short form. See the full Common Core Grade 1 math standards.