Two Digit Addition w/ and w/out regrouping - ProTeacher Community





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Two Digit Addition w/ and w/out regrouping
Old 01-20-2010, 08:00 PM
 
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Does anyone know of fun games/activities to practice this skill?


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dice game
Old 01-21-2010, 08:13 AM
 
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My kids love to play a partner dice game to practice this skill. The first person rolls a die two time to make a two-digit number. They roll again to make a second two-digit number and add them together. Their partner does the same thing. Whoever gets the greater sum gets a tally mark. The person with the most tally marks at the end is the winner.
They love playing this and even choose to do it for a free time activity. Hope this makes sense.
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dice game
Old 01-21-2010, 09:12 AM
 
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My students really enjoy playing this game. The only problem is that you might have to regroup.....They use two dice a white one that represents the ones and a red dice that represents the tens. EX Red dice 4----White dice 3 equals the number 43 Then they collect 4tens (longs) and 3 units. On their next roll they add to the number that they have. This is where they would have to make the exchanges.
They started with 43 and rolled Red 5 and white 2. This means add 43+52...and so on until someone reaches 100 or 1000. The really neat thing is that you can give your better math students dice with larger numbers and everyone is playing the same game. If they don't make the correct exchange and their partner catches them they have to go back to zero. This looks confusing, but it is fun.
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2 digit additon activity
Old 01-21-2010, 01:25 PM
 
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I have my students do an activity as a center/station. Using playing cards they select two cards and place them side by side (that's the top 2 digit number). Then they select another two cards and place them underneath (that's the bottom 2 digit number). Write it on paper and work out the problem using strategies we have learned in class. It's a nice independent activity and they can also work in partners.
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addition
Old 01-22-2010, 03:52 PM
 
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Not a game, but I wrote addition problems on chart paper and let my kids solve them with a partner. They wrote with a marker. They loved laying on the floor and writing on the chart paper.


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Old 01-22-2010, 06:53 PM
 
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Race to 100.

Partners
2 die

Players take turns rolling dice. Write down sum of dice on paper. Adding on each turn they roll and regrouping when necessary. The first one to 100 wins.

I started my second graders playing this game first with base ten blocks to practice regrouping. Once they learned how to regroup with pencil and paper we played it that way. They love it.
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Old 01-23-2010, 07:56 AM
 
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Dominoes,

I have baggies of foam dominoes (one bag per pair). Students pull out two dominoes and lay them length wise on the table. So for instance: if I pull out a 6 dot /3 dot the number could be 63 or 36. The second one I pull out 2 dot/6 dot the number could be 26 or 62. The student puts one on top of the other and my kids use their individual whiteboards and solve the problem.

63+26 or 36+26 etc.

My higher students I have them either pull out three dominoes to make three 2-digit numbers or pull three (laying vertically) and make 3-digit numbers.

This is a favorite in my room
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Many Thanks....
Old 01-27-2010, 08:13 PM
 
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for all the great ideas!!!!
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activities
Old 01-27-2010, 09:36 PM
 
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Attached Files
File Type: doc domino add-sub.doc (23.5 KB, 388 views)
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Hooks for two and three digit addition
Old 11-15-2011, 06:35 PM
 
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Does anyone have any good hooks when the children are entering the math class? We switch in 2nd grade so I get a new set of children when it is math time. I need to list hooks on my lesson plans to get them "hooked in." Any ideas would be much appreciated.
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Math hooks
Old 09-24-2014, 08:47 AM
 
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We switch classes for second grade math, and I am needing some math hooks as well. Does anyone have anything that would work?
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