

Unit 4 Place Value, Comparison, Addition and Subtraction to 40 Grade 1 Math 


Description: Students build understanding of
place value. Addition and subtraction within 40 rest primarily on
establishing a “ten” as a unit that can be counted. Students begin to see a
problem like 23 + 6 as an opportunity separate the “2 tens” in 23 and
concentrate on the familiar addition problem 3 + 6. Adding 8 + 5 is related
to solving 28 + 5; complete a unit of ten and add 3 more. 

Louisiana
Student Standards for Mathematics (LSSM) Instructional
Outcomes 





Enduring Understandings: ·
Students
will solve various types of addition and subtraction word problems and
equations using strategies. ·
Students
will use place value to compare two numbers.
·
Students
will add twodigit and onedigit numbers with and without composing a group
of ten. ·
Students
will develop strategies for adding and subtraction whole numbers. ·
Students
will understand that addition and subtraction are processes in which groups
are joined and separated. 
Essential Questions: ·
What
happens when we join two quantities or take one from another? ·
How
can we find the total when we join two quantities? ·
How
can we find what is left when we take one quantity from another? ·
How
can we find the difference when we compare one quantity to another? ·
How
can we compare one quantity to another? ·
How
can we represent problem situations? ·
How
can we show that addition and subtraction are related? 


