Price: 200 points or $2 USD
Subjects: math
Grades: 1,2,3
Description: Students will subtract using an open number line. This deck only requires students to subtract tens from tens. These cards are randomized. CCSS.MATH.CONTENT.2.NBT.B.5 Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction. CCSS.MATH.CONTENT.2.NBT.B.9 Explain why addition and subtraction strategies work, using place value and the properties of operations.