1ST GRADE MATH

1.OA.A.1

Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions.

1.OA.A.2

Solve word problems that call for the addition of three whole numbers whose sum is less than or equal to 20.

1.OA.B.3

Apply properties of operations as strategies to add and subtract.

1.OA.B.4

Understand subtraction as an unknown addend problem.

YouTube

1.OA.C.5

Relate counting to addition and subtraction.

1.OA.C.6

Add and subtract within 20, demonstrating fluency for addition and subtraction within 10.

1.OA.D.7

Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false.

1.OA.D.8

Determine the unknown whole number in an addition or subtraction equation relating to three whole numbers.

YouTube

1.NBT.A.1

Count to 120, starting at any number less than 120. In this range, read and write numerals and represent a number of objects with a written numeral.

1.NBT.B.2

Understand that the two digits of a two-digit number represent amounts of tens and ones.

1.NBT.B.3

Compare two two-digit numbers based on meanings of the tens and one's digits, recording the results of comparisons with the symbols >, =, and <.

1.NBT.C.4

Demonstrate understanding of addition within 100, connecting objects or drawings to strategies based on place value (including multiples of 10), properties of operations, and/or the relationship between addition and subtraction. Relate the strategy to a written form

1.NBT.C.5

Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.

1.NBT.C.6

Subtract multiples of 10 in the range 10–90 from multiples of 10 in the range 10–90 (positive or zero differences), using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.

1.MD.A.1

Order three objects by length; compare the lengths of two objects indirectly by using a third object.

1.MD.A.2

Express the length of an object as a whole number of length units, by laying multiple copies of a shorter object (the length unit) end to end; understand that the length measurement of an object is the number of same-size length units that span it with no gaps or overlaps. Limit to contexts where the object being measured is spanned by a whole number of length units with no gaps or overlaps.

YouTube

1.MD.B.3A

Tell and write time in hours and half hours using analog and digital clocks.

1.MD.B.3B

Identify coins by name and value (pennies, nickels, dimes and quarters).

1.MD.C.4

Organize, represent, and interpret data with up to three categories; ask and answer questions about the total number of data points, how many in each category, and how many more or less are in one category than in another.

1.G.A.1

Distinguish between defining attributes versus non-defining attributes; build and draw shapes to possess defining attributes.

1.G.A.2

Compose two-dimensional shapes or three-dimensional shapes to create a composite shape.

1.G.A.3

Partition circles and rectangles into two and four equal shares, describe the shares using the words halves, fourths, and quarters and use the phrases half of, fourth of, and a quarter of. Describe the whole as two of, or four of the shares. Understand for these examples that decomposing into more equal shares creates smaller shares.