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 with missing numbers (missing addend)
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".
Comparisons – compare numbers and sums
Subtraction and Addition in the Same Picture – the connection between subtraction and addition
Two subtractions from one addition
The concept of "how many more"
"How many more" problems and differences
Naming and writing 2-digit numbers
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)
Whole and half hours (telling time using only the hour hand)
Minutes and half hours (the minute hand is introduced)
AM and PM (morning and afternoon) hours
Halves, quarters — and thirds too!
Measuring in whole centimeters
Adding without carrying – add a 2-digit number and a single-digit number mentally - no regrouping
Add and subtract two-digit numbers – without regrouping
"Make ten" (and go over ten) strategy for addition
A mental math trick with nine and eight
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"Mini" Math Teaching CourseThis is a little "virtual" 2-week course, where you will receive emails on important topics on teaching math, including:
- How to help a student who is behind You will also receive: A GIFT of over 400 free worksheets and sample pages from my books right in the very beginning.![]() We respect your email privacy.
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Maria's Math TipsEnter your email to receive math teaching tips, resources, Math Mammoth news & sales, humor, and more! I tend to send out these tips about once monthly, near the beginning of the month, but occasionally you may hear from me twice per month (and sometimes less often). Peek at the previous tips here. You will also receive:
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