

Unit 2 Introduction
to Place Value Through Addition and Subtraction Within 20 Grade 1 Math 


Description: Students add and subtract within
20. Students model adding and subtracting across ten in word problems and
with equations. In Unit 1, students grouped 10 objects to make a ten. In unit
2 students transition to conceptualizing that ten as a single unit (using 10
linking cubes stuck together, for example). This is a major steppingstone in
understanding place value, learning to group 10 ones as a single unit: 1
ten. 

Louisiana
Student Standards for Mathematics (LSSM) Instructional
Outcomes 





Enduring Understandings: ·
Students
will understand the relationship between addition and subtraction. ·
Students
will understand the part and whole relationships within numbers. ·
Students
will compose and decompose the numbers 1 to 10. ·
Students
can solve various types of word problems using objects, drawings, and
symbols. ·
Students
will develop fact fluency for addition and subtraction within 10. 
Essential Questions: ·
How do we show that numbers work together? ·
How can we show and explain our thinking?
·
How does understanding numbers help me? ·
How do drawing pictures and words help me
understand numbers? ·
How can a problem be solved in different way? 


