![]() |
|
||||
| Home | Blog | My books! | Newsletter | Worksheets | Lessons | Videos | Online math resources | Reviews | Curriculum guide |
|
Tweet |
|
Maria's Math news - a FREE math newsletter for parents and teachers Subscribe below:
Worksheets Various worksheets on TONS of math topics you can generate for free!
Basic operations worksheet generator is updated! Make worksheets for whole numbers or integers - all four operations, including add & subtract or multiply & divide - horizontal or vertical - add a border and/or extra workspace, use a variable, and more.
Curriculum Advice, reviews, and resources to help you choose a math curriculum! Online math games, tutorials, and activities Games you can play online, interactive tutorials, fun math websites and more. Arranged by topic/level for ease of use. Lessons Learn how to TEACH concepts or about general concerns in math education. Reviews In-depth reviews of math products Math help & tutoring A list of free message boards, math help websites, and online tutoring services. Fun and games I have two games on my site, plus links to many. Game: Choose Math Operation Word guess game (easy hangman) Word guess game (difficult) |
The ideas in this subtraction lesson are taken from Math Mammoth Add & Subtract 2-B book. Regrouping in SubtractionIn this lesson I show how to teach regrouping (borrowing) in subtraction. We start out by teaching the actual regrouping separately, and then transfer that step-by-step into the subtraction algorithm.The video below shows a similar idea.
First, teach the students about regrouping as explained in the box below.
Example exercises follow. Here, students
practice regrouping by itself, without sutbracting anything.
In the following exercises, the
regrouping is done in the pictures. Students take note of that, then
"cross out" or subtract something.
In these exercises, students regroup, then subtract. The presentation uses "tens" and ones.
After this, the students should be ready to learn the usual form of subtracting where the numbers are in columns.
Now students can practice the normal way of subtraction in columns. The exercises below have the additional prompt for students to regroup before they subtract in columns.
When students do normal subtraction problems, instruct them to always check their answer by adding.
The ideas and excerpts in this subtraction lesson are taken from Math Mammoth Add & Subtract 2-B book. You can purchase it as an inexpensive download or as a printed book. |
The fast, FUN, and easy way to learn multiplication. Learn the upper times tales in two sittings using mnemonic stories. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
Copyright 2003-2013 Maria Miller
About
Privacy policy
Contact
Advertise