The main purpose of Math Mammoth Add & Subtract 2-A is to learn the basic addition facts of single-digit numbers where the answer goes over ten, and learn to use them
with subtraction.
This book also deals with the concepts of completing the ten, and how to use that when adding: for example 9 + 5 can be seen as 9 + 1 + 4, where 9 + 1 completes the ten, and so we have 4 left
over to go over ten.
With subtracting, the child first subtracts TO ten with problems such as 16 − __ = 10. Then come subtraction problems which "cross" the ten the other direction, such as 16 − 7. Again the student first practices these by subtracting in two parts: first subtracting to ten, then the rest. For example, 16 − 7 becomes 16 − 6 − 1.
Later in the book various fact families are studied, including with the help of pretty "number rainbows".
Thank you so much for new edition of the Add/Subtract 2a book!! I gave the new pages as homework tonight and am amazed to see the excitement the rainbows have created working with inverse operations/fact families. Thank you, again! I love incorporating your worksheets into our lessons it has made my children confident independent workers! Your newsletters and blogs are so worth the read!! The information you have and receive about math is making a tremendous difference in my home everyday!! Your consideration, work, time, and effort is greatly appreciated by my family.
Shai Hawk
The followup to this book is Add & Subtract 2-B, which practices adding and subtracting in columns and mentally within 0-100.
Package deals!
Blue Series package - $53 (download) or $58 (CD)
Golden/Green Series package - $50 (download) or $55 (CD)
All Inclusive package - $91 (download) or $96 (CD)
LightBlue Series package - $72 (download) *BONUS* With any package purchase above you will get Soft-Pak software for FREE (includes 4 math, 1 language arts, 2 testing programs).
Learn moreOrder packages
*BONUS* - FREE MATH SOFTWARE
With any purchase of Math Mammoth books, you will qualify to get Soft-Pak math programs (list price $24.95) for just a small $3.50 s&h fee!
* 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
With any CD purchase or Blue Series download, you will get those above plus 3 programs more, for FREE, included on the CD.
All the books on this website are available for *nearly instant download.
*Order processing at Kagi takes 1-2 hours; I do not know how quick it is at the other stores.
Kagi store - all of the ebooks and CDs. Kagi accepts all major credit cards, Paypal, check, cash, money order, purchase order, and a wire transfer. I maintain four different order pages at Kagi:
Kagi handles all my downloadable products and the CDs, and accepts all major credit cards, checks, Paypal (USD), money orders, and even cash. Please see Kagi FAQ for any questions about the payment methods.
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.
Math Teaching Emails
This is a little "virtual" email course. You will receive:
The package of 280 free worksheets and sample pages;
6 math teaching articles;
2 emails discussing the books;
Homeschool Math newsletter.
Note: You will FIRST get an email that asks you to confirm your email address. PLEASE check also your SPAM/JUNK folder for this confirmation email.
Newsletter
Subscribe to my monthly Homeschool Math Newsletter, and receive a GIFT of over 280 FREE math worksheets and sample pages from Math Mammoth books for grades 1-9.
Note: This is a double opt-in list. You will FIRST get an email that asks you to confirm your email address. PLEASE check also your SPAM/JUNK folder for this confirmation email.
have created working with inverse operations/fact families. Thank you, again! I love incorporating your worksheets into our lessons it has made my children confident independent workers! Your newsletters and blogs are so worth the read!! The information you have and receive about math is making a tremendous difference in my home everyday!! Your consideration, work, time, and effort is greatly appreciated by my family.
