Videos for addition and subtraction topics for grades 1-4
Find here free online math videos topics related to addition and subtraction, meant for 1st, 2nd, 3rd, and 4th grades.
The videos listed here are additionally correlated to the Blue Series books Addition 1, Subtraction 1, Add & Subtract 2-A, Add & Subtract 2-B, Add & Subtract 3, and Add & Subtract 4.
Addition of single-digit numbers
These videos match the topics in Math Mammoth Addition 1 (Blue Series).
Addition with missing numbers (missing addend)
Addition facts within 10 — six videos matching the lessons titled "Sums with 6", "Sums with 7", "Sums with 8", "Sums with 9", and "Sums with 10".
Subtraction within 0-10 and related concepts
These videos match the topics in Math Mammoth Subtraction 1 worktext (Blue Series).
Subtraction and Addition in the Same Picture – the connection between subtraction and addition
Two subtractions from one addition
The concept of "how many more"
Addition & subtraction facts within 0-10
These videos match the topics in Math Mammoth Subtraction 1 worktext (Blue Series).
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)
Addition and Subtraction Facts Within 0-18
These videos match the topics in Math Mammoth Add & Subtract 2-A worktext (Blue Series).
A mental math trick with nine and eight
Difference, subtraction, and "How many more" additions
Number rainbow & fact families with 11
Number rainbow & fact families with 12
Mental addition and subtraction of two-digit numbers
These videos match the topics in Math Mammoth Add & Subtract 2-B worktext (Blue Series).
Adding within the same ten – add a 2-digit number and a single-digit number mentally - no regrouping
Add and subtract two-digit numbers – without regrouping
Add and subtract whole tens (to/from 2-digit numbers)
Going over ten — "make ten" (and go over ten) strategy for addition
Mental addition — several strategies explained
Mental subtraction — several strategies explained
More Mental subtraction — more strategies explained
Regrouping in addition and subtraction (2-digit numbers)
These videos match the topics in Math Mammoth Add & Subtract 2-B worktext (Blue Series).
Add a 2-digit number and a single-digit number mentally – no regrouping
Mental addition of two-digit numbers
Add three or four single-digit numbers mentally
Regrouping in subtraction, parts 1 and 2 (with 2-digit numbers)
Regrouping in subtraction, part 3 – includes word problems with Mathy and Giganto (mammoth mascots)
Mental subtraction, parts 1 and 2 – strategies for mental subtraction
Addition and Subtraction with 3-digit numbers
These videos match the topics in Math Mammoth Add & Subtract 3 worktext (Blue Series).
Mental addition (3-digit numbers)
Mental subtraction with three-digit numbers
Regrouping 10 tens as one hundred (3-digit addition)
Regrouping one hundred as 10 tens in subtraction
Regrouping one hundred as 10 tens in subtraction: word problems and puzzles
Regrouping twice in subtraction
Regrouping (in subtraction) with zero tens
Three-digit subtraction word problems and a puzzle
The connection with addition and subtraction
The order of operations — parenthesis, addition & subtraction only
Addition and subtraction topics for 4th grade
These videos match the topics in Math Mammoth Add & Subtract 4 worktext (Blue Series).
Bar models in addition and subtraction problems
The order of operations and writing simple expressions
Making a bar graph plus word problems
Calculate and estimate money amounts
Calculate and estimate money amounts: word problems
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