What Is A Doubles Fact

If you take a 2nd grader, than you may be familiar with doubles and almost doubles. This form of math facts with doubles numbers (adding two numbers that are the same) and well-nigh doubles (adding two numbers that are virtually the same), can assist kids quickly acquire math facts with a brain trick. We created a spider activity that was a fun way to practice doubles and nigh doubles!

Adding Doubles and Near Doubles in Second Grade Math up to 20, with a hands-on math, spider theme.

What are Doubles and Near Doubles?

We explained this a scrap, but let's expand on these math definitions.

You might be thinking, "What!?" I have to admit, adding virtually doubles is a concept that I learned forth with my oldest when she went through second grade.

What is Doubles and Near Doubles in 2d grade math?

Doubles are the addends that are exactly the same. These are improver facts that 2d graders need to know to add within 20.

Virtually Doubles are those addends that are about a double fact. And so, 4+5 is very close to 4+4. Students tin can easily recall that the double fact for 4+4=viii and past adding 1 more, they quickly know that 4+five=9. These are math fact tools that tin help 2nd graders add within 20.

Doubles Math Facts

Doubles math facts include:

0+0=0
1+one=2
two=ii+four
three+3=vi
4+4=8
5+5=ten
6+6=12
7+7=xiv
8+8=16
ix+ix=xviii
ten+10=twenty

Near Doubles Facts

About doubles facts depend on the doubles that the numbers are almost.

0+0=0
- 1+0=one
- 0+one=1
1+one=ii
- 2+one=3
- i+2=3
- 0+ane=1
- 1+0=ane

2+2=iv
- 3+2=5
- two+3=5
- ane+two=3
- 2+1=3
3+3=6
- 4+3=7
- 3+four=vii
- two+iii=five
- three+2=5
iv+4=viii
- 5+4=9
- 4+v=nine
- 3+4=7
- 4+3=seven
5+five=10
- 6+five=11
- 5+six=11
- 4+5=nine
- v+4=9
6+6=12
- 7+6=13
- 6+7=xiii
- 5+6=11
- vi+5=eleven
7+seven=xiv
- 8+7=xv
- vii+8=15
- half dozen+7=thirteen
- seven+6=13
8+eight=sixteen
- 9+8=17
- viii+9=17
- vii+8=fifteen
- 8+7=15
nine+9=eighteen
- 10+ix=19
- 9+10=19
- eight+9=17
- ix+8=17
10+10=20
- 11+ten=21
- ten+11=21
- 9+10=nineteen
- ten+nine=19

You lot can see how learning only a handful of doubles facts builds a bigger repertoire of math facts. This is a especially good path strategy for learning tricky improver facts that kids often struggle with, specially with adding the college 6'southward, 7'due south, 8's, and 9's.

Adding Doubles and Most Doubles

Adding doubles is a math fact memorization technique. It is easier for kids to remember that 2+two=iv, half dozen+six=12, 7+vii=14, 9+9=xviii, etc.

Kids can first memorize the doubles facts. Once they've got those addition facts downwards pat, recognizing that the near doubles facts are just one off from the double makes learning a whole new set of numbers piece of cake.

For instance:

First the pupil would memorize the nearly double of 6+6=12.

So, when that becomes a math fact they know by sight, they tin can expect at the math trouble 6+5 and recognize that the addend five is just 1 less than the doubles fact for 6. They tin know the number sense that the problem 6+5 is one less than 6+6 and hands identify the reply of 11.

Similarly, if the student is presented with the about doubles problem of 6+7, they can recognize that the addend 7 is one more than the doubles fact for 6. They tin identify past number sense that the answer for 6+vii is ane more than than six+six and that the answer is thirteen.

About doubles aid students with adding one more than or one less than the doubles facts.

By this, nosotros hateful that in one case a pupil knows the doubles fact of 6+half dozen=12, they then also know:

vi+5=11
5+6=xi
6+7=thirteen
7+half dozen=13

You can run across how the doubles and virtually doubles concept builds number sense and allows students to go much more fluent and efficient at math bug.

Doubles and Nigh Doubles Activeness

We made this near doubles activity to help with second grade math concepts, specifically in adding Doubles and calculation Near Doubles., using a fun spider craft. The OT in me loves that it works on quite a few fine motor skills and scissor skills also!

I wanted to create a easily-on math activity using the doubles and Virtually Doubles addition facts with a spider theme.

It's an like shooting fish in a barrel and quick activeness to set up, that volition assistance second graders realize how to speedily effigy out more improver facts quite hands. This is a math skill appropriate for Mutual Core Standards CCSS 2.0A.1 and CCSS 2.0A.two. You lot can see those Common Core standards here.

To make your Near Doubles Spider Activity

Cut out paper strips to write doubles and near doubles addition facts.

You'll need just a few materials for this doubles and about doubles do activeness:

Black construction newspaper
White colored pencil
Scissors
Gum
Googly eyes

To brand this doubles and near doubles craft, complete these steps:

Cutting out viii strips of black construction paper. These volition become the spider'south legs.
Using a white colored pencil, write out doubles facts on i side of the black paper strips. Yous'll need to write the following doubles facts on the paper strips:
- ii+2=__
- 3+three=__
- 4+4=__
- 5+5=__
- half dozen+6=__
- seven+seven=__
- 8+8=__
- 9+9=__
On the other side of each spider leg paper strip, write with your white colored pencil:
- 2+3=__
- 3+4=__
- iv+5=__
- v+6=__
- 6+7=__
- 7+8=__
- eight+9=__
- nine+eight=__
Cut out a circle out of the black paper for the head.
Glue googly eyes onto the spider'southward head.
Glue the legs to the spider head then the Doubles are all on 1 side and the About Doubles are all on the other side.

Kids can flip the legs over to see how closely the doubles are to the Near Doubles and how knowing the Doubles facts can quickly assist them figure out the Near Double facts.

You can make multiple versions of these numbers, using the commutative property of addition.

Spider craft to work on doubles and near doubles facts.

More Hands-On Math Activities y'all volition love:

$Commutative Property of Addition$ $Use play dough in math$ $Bottle caps in first grade math$

Colleen Beck, OTR/L is an occupational therapist with xx+ years experience, graduating from the University of Pittsburgh in 2000. Colleen created The OT Toolbox to inspire therapists, teachers, and parents with like shooting fish in a barrel and fun tools to help children thrive. Every bit the creator, author, and owner of the website and its social media channels, Colleen strives to empower those serving kids of all levels and needs. Want to interact? Send an email to contact@theottoolbox.com.