Skip to main content
district home page calendar  lunch menus  myschoolbucks  schooltool  Tipline 

Module 2
Introduction to Place Value Through
Addition and Subtraction Within 20


 

Overview

Throughout this Module, students will:
  • solve addition and subtraction problems with teen numbers
  • explore place value by making ten and taking from ten
  • add and subtract within 20 to solve word problems
  • solve word problems with 3 whole numbers whose sum is no greater than 20
  • understand that 8+3=11 has the same value as 3+8=11 (Commutative Property)
  • make 10 when adding numbers (ex. 2+6+4 = 2+10=12) (Associative Property of Addition)
  • add and subtract fluently by making 10 
  • work with tens and ones - bundling ten ones to make a ten (ex. 17 is a bundle of ten and 7 ones)

Vocabulary

Terminology Definition Illustration
Associative Property
of Addition
Changing the groupings of three addends
does not change the sum
     
Commutative Property
of Addition
Changing the order of the addends does 
not change the sum
     
Making ten A strategy that uses combinations of numbers
that add up to ten
     
Ten A bundle of ten ones. One more than 9;
one less than 11.
     
Ones individual units, ten of which become
a ten
     
5 Groups grouping numbers in 5's
     
Number Bond a graphic showing part, part, whole
     
Additional Resources







solving problems with 3 addends by making 10 from JD K-4 Math on Vimeo.

decomposing an addend to make 10 when adding from JD K-4 Math on Vimeo.

using larger addends to compose 10 from JD K-4 Math on Vimeo.

decomposing into tens with subtraction from JD K-4 Math on Vimeo.
 

Take from 10 Strategy from JD K-4 Math on Vimeo.

Counting on Strategy from JD K-4 Math on Vimeo.


DISTRICT

OUR SCHOOLS




Dr. Peter Smith, Superintendent

P.O. Box 606
DeWitt, NY 13214

Phone: (315) 445-8300
www.jamesvilledewitt.org


Developed by CNYRIC