Instructional Outcomes
1.OA.1: Use addition and subtraction
within 20 to solve word problems involving situations of adding to, take
from, putting together, taking apart, and comparing,
with unknowns in all positions, e.g., by using objects, drawings,
and equations with a symbol for the unknown number to represent the
problem.
 I can use a symbol (e.g. ?,
x) to represent an unknown number in a problem.
 I can determine the
operation to solve word problems with unknowns.
 I can use different
strategies for addition to solve word problems within 20.
 I can use different
strategies for subtraction to solve word problems within 20.
 I can solve word problems
by adding 3 numbers in different ways.
1.OA.2: Solve
word problems that call for addition of three whole numbers whose sum is
less than or equal to 20, e.g., by using objects, drawings, and equations
with a symbol for the unknown number to represent the problem.
·
I
can add 3 numbers.
·
I
can identify parts/addends in a word problem.
·
I
can show how to solve word problems
1.OA.3: Apply properties of operations
as strategies to add and subtract. Examples: If 8 + 3 = 11 is known, then 3 + 8 =11 is
also known. (Commutative property of
addition.) To add 2 + 6 + 4 = 2 + 10
= 12. (Associative property of
addition.)
 I can use fact families to
help me solve addition problems. (commutative)
 I can explain how
properties of addition and subtraction work.
 I can use strategies to
solve addition and subtraction problems.
1.OA.4: Understand subtraction as an
unknownaddend problem. For example, subtract 10 8 by finding
the number that makes 10 when added to 8.
·
I
can identify the unknown in a subtraction problem.
·
I
can solve subtraction problems to find the missing addend.
·
I
can explain the relationship of addition and subtraction.
1.
OA.5: Relate
counting to addition and subtraction (e.g., by counting on 2 to add 2).
 I can count on from a given number.
 I can count back from a given number.
 I can explain how counting on relates to
addition.
 I can explain how counting back relates to
subtraction.
 I can explain how counting on relates to
subtraction.
1.OA.6: Add and subtract within 20,
demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on;
making 10 (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number
leading to a ten (e.g., 13 4 = 13 3 1 = 10 1 = 9); using the
relationship between addition and subtraction (e.g., knowing that 8 + 4 =
12, one knows 12 8 =4); and creating equivalent but easier or known sums
(e.g., adding 6 + 7 by creating the known equivalent 6 + 6 +1 = 12 + 1 =
13).
 I can add within 20.
 I can subtract within 20.
 I can use strategies to add
and subtract within 20.
 I can add fluently within
10.
 I can subtract fluently
within 10.
1.OA.7: Understand the meaning of the
equal sign, and determine if equations involving addition and subtraction
are true or false. For example, which of the following
equations are true and which are false? 6 = 6, 7 = 8 1, 5 + 2 = 2 + 5, 4
+ 1 = 5 + 2.
·
I can explain the meaning of an
equal sign.
·
I can compare the values on each
side on an equal sign.
·
I can determine if the equation
is true or false.
1.OA.8: Determine the unknown whole
number in an addition or subtraction equation relating three whole numbers.
For example, determine the unknown number that makes the equation true in
each of the equations 8 + ? = 11, 5 = ＿
3, 6 + 6 = ＿.
 I can recognize partpartwhole
relationships of three numbers
 I can figure out the
missing value in an addition equation.
 I can figure out the
missing value in a subtraction problem.
