First Grade Love
All Things First Grade Math!
Unit 15-Operation Connections
This unit bundles student expectations that address generating and solving addition and subtraction problems, explaining solution strategies, and applying basic addition
and subtraction fact strategies.
Prior to this unit, in Unit 10, students used a variety of objects, pictorial models, and properties of operations, and strategies to generate and solve addition and subtraction
problems using data represented in picture and bar-type graphs. Students represented and explained solution strategies using words, objects, pictorial models, and number
sentences, including number sentences with an unknown in any position. Students explored and applied relationships found in basic addition and subtraction facts to solve
problems.
During this unit, students will refine their understanding of addition and subtraction. Students will generate and solve addition and subtraction problems within 20 using a
variety of objects, pictorial models, and strategies. Students will apply basic fact strategies and properties of operations (additive identity, associative property of addition, and commutative property of addition) to add and subtract two or three numbers, including determining the unknown when the unknown may be any one of three or four terms in the equation. Students will represent and explain their solution strategies using words, objects, pictorial models, and number sentences, including explaining the role of the equal sign in an equation. Thorough understanding of analyzing problem situations and using the problem-solving process in addition and subtraction situations within 20 is critical to setting the foundation for students’ success in mathematics as they progress through future grade levels.
After this unit, in Grade 2, students will apply flexible strategies based on place value and properties of operations to solve and represent addition and subtraction situations
within 1,000, including adding and subtracting two- and three-digit numbers with regrouping. The relationship between place value and each flexible method and/or model will
be emphasized in order to prepare students for the transition to standard addition and subtraction algorithms. Continued use of basic addition and subtraction fact strategies
to solve problems will lead to automatic recall and fact fluency.
A few notes about word problems...
There are 2 big categories: Action and Relationships. Within Action type problems there are Joining and Separating problems. In these types of problems the result, change, or start could be the unknown. Within the Relationship category there are Part-Part-Whole and Comparing problems. When talking about Part-Part-Whole problems the whole or the part could be the unknown.
Helping students understand how to write an appropriate number sentence and understanding which part of the problem is unknown is key. Students must understand what they are solving.
Jacque Prater
Email: jacque.prater@wylieisd.net
Phone: 972-429-3071
Facebook: https://www.facebook.com/jacque.cope
Twitter: @jkprater13