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Perform addition and subtraction up to 20.
Add and subtract whole numbers (CCSS.Math.Content.1.OA.C.6):
Solve addition and subtraction equations (CCSS.Math.Content.1.OA.D.8):
Describe place value and perform addition and subtraction up to 120.
Describe the place values of a number (CCSS.Math.Content.1.NBT.B.2):
Compare the magnitudes of numbers (CCSS.Math.Content.1.NBT.B.3):
Add whole numbers (CCSS.Math.Content.1.NBT.C.4):
Subtract with multiples of 10 (CCSS.Math.Content.1.NBT.C.6):
Measure lengths and tell time to the nearest half-hour.
Measure the lengths of objects in terms of various units (CCSS.Math.Content.1.MD.A.2):
Tell and write time (CCSS.Math.Content.1.MD.B.3):
Define and partition shapes.
Get definitions of shapes (CCSS.Math.Content.1.G.A.1):
Compare attributes of shapes (CCSS.Math.Content.1.G.A.1):