This is a collection of free math videos for 1st grade, showing varied exercises for each topic. You can view them here on my site or at my YouTube channel (www.youtube.com/user/mathmammoth). The videos match Math Mammoth Grade 1 curriculum but will also work no matter which curriculum you follow (in other words, the videos don't rely on you having Math Mammoth curriculum).
These videos are usable for students, teachers, and parents. You can use them...
Please choose a topic from the list.
Addition facts within 10 — six videos matching the lessons titled "Sums with 5", "Sums with 6", "Sums with 7", "Sums with 8", "Sums with 9", and "Sums with 10".
Subtraction and Addition in the Same Picture – the connection between subtraction and addition
Two subtractions from One Addition
"How Many More" Problems and Differences
Add and Subtract Whole Tens (e.g. 20 + 70 or 80 − 40)
Addition and Subtraction Facts with 6 (fact families)
Addition and Subtraction Facts with 7 (fact families)
Addition and Subtraction Facts with 8 (fact families)
Addition and Subtraction Facts with 9 (fact families)
Subtracting More Than One Number
Whole and Half Hours (telling time using only the hour hand)
Minutes and Half Hours (the minute hand is introduced)
Measuring Lines in Centimeters
Adding or Subtracting Two-Digit Numbers – without regrouping