Math Mammoth Add & Subtract 4 covers the following addition and subtraction related topics which are
approximately for the third and fourth grade level:
mental addition and subtraction strategies;
adding and subtracting in columns;
Roman numerals;
the connection between addition and subtraction, missing addend problems, and solving word problems with bar
diagrams;
order of operations;
bar graphs, line graphs, and money problems.
The lessons in this book are taken from the first chapters of Math Mammoth Grade 3 and Grade 4 Complete
Worktexts (LightBlue Series 3rd and 4th grade).
The first lessons cover the "technical aspects" of adding, such as mental math strategies, terminology, and
adding in columns. These are repeated for subtraction. Children also get to see how the sum or difference
changes if the numbers in the problems change and how that can be used to solve problems mentally.
The addition and subtraction connection is already a familiar topic, but the first lesson on this topic
practices this with bigger numbers. In the next lessons, the student solves word problems with the help of
bar diagrams. Next, we solve simple missing addend equations using subtraction, such as x + 20 = 60. We
use bar diagrams to illustrate these and connect them with fact families. These lessons help students think
algebraically.
We also practice subtracting in columns and borrowing. The lessons illustrate this process with the help of
pictures that relate to the three different place values.
Students are also introduced to parentheses and the order of operations including building the
mathematical expression (calculation) needed for certain real-life situations.
Students also get to practice their adding and subtracting skills when reading a mileage chart, bar graphs,
line graphs, rounding, estimating, and money problems.
Better Yet - Package Deals!
Blue Series package - $60 (download) or $65 (CD)
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*BONUS* - SOFT-PAK MATH SOFTWARE
I bet you'd have to agree: this is a steal! You can get Soft-Pak math programs (list price $24.95) for just a small $3.50 s&h fee - just by ordering ANY of my books... but you need to order at Kagi store!
* Math Maker, for printable math activities with answer keys
* Math Master, for on screen practice of various math topics
* Math User, for answering the 900 multi-level word problems
* True/False Math Challenger for mastering facts 1-12
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After completing the order at Kagi, you will receive an email with download links for each book you bought, or for a zip file for the packages. You click on the links and download the books to your computer's hard drive. That's it!
In case of any problems with the download, you can always email me, and I can email the books to you directly. My contact info will be in the email you receive.
By purchasing any of the books, permission IS granted for the teacher (or parent) to reproduce this material to be used with his/her students in a teaching situation; not for commercial resale. However, you are not permitted to share the material with another teacher.
In other words, you are permitted to make copies for the students/children you are teaching, but not for other teachers' usage.
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