1: Grade 1

Grade 1

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Addition and subtraction within 20 become the central focus, with students solving word problems in all positions and developing fluency. Counting extends to 120, and place value work covers two-digit addition and subtraction. Measurement covers length comparison, time, and money; shapes are identified, composed, and described by their attributes.

1.1Use addition and subtraction to solve word problems within 20 by using concrete objects, drawings, and equations with a symbol for the unknown number to represent the problem.1.10Extend the number sequence from 0 to 120.1.11Explain that the two digits of a two-digit number represent amounts of tens and ones.1.12Compare pairs of two-digit numbers based on the values of the tens and ones digits, recording the results of comparisons with the symbols >, =, and < and orally with the words “is greater than,” “is equal to,” and “is less than.”1.13Add within 100, using concrete models or drawings and strategies based on place value.1.14Given a two-digit number, mentally find 10 more or 10 less than the number without having to count, and explain the reasoning used.1.15Subtract multiples of 10 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.1.16Organize, represent, and interpret data with up to three categories.1.17Order three objects by length; compare the lengths of two objects indirectly by using a third object.1.18Determine the length of an object using non-standard units with no gaps or overlaps, expressing the length of the object with a whole number.1.19Tell and write time to the hours and half hours using analog and digital clocks.1.2Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20 by using concrete objects, drawings, or equations with a symbol for the unknown number to represent the problem.1.20Identify pennies and dimes by name and value.1.21Build and draw shapes which have defining attributes.1.22Compose two-dimensional shapes (rectangles, squares, trapezoids, triangles, half-circles, and quarter-circles) or three-dimensional shapes (cubes, right rectangular prisms, right circular cones, and right circular cylinders) to create a composite shape, and compose new shapes from the composite shape.1.23Partition circles and rectangles into two and four equal shares and describe the shares using the words halves, fourths, and quarters, and use the phrases half of, fourth of, and quarter of.1.3Apply properties of operations as strategies to add and subtract.1.4Explain subtraction as an unknown-addend problem.1.5Relate counting to addition and subtraction. Example: counting on 2 to add 21.6Add and subtract within 20.1.7Explain that the equal sign means “the same as.” Determine whether equations involving addition and subtraction are true or false.1.8Solve for the unknown whole number in various positions in an addition or subtraction equation, relating three whole numbers that would make it true.1.9Reproduce, extend, and create patterns and sequences of numbers using a variety of materials.1.DAData Analysis1.GGeometry1.MMeasurement1.OATOperations and Algebraic Thinking1.ONBTOperations with Numbers: Base Ten
Example Problems
Joey examined the age of her cousins.
NameAge (years)
Tommy6
Margie5
Sadie3
Ben3
Harriet8
Isaiah3


What is the
mode of the age of her cousins?
Write an equation to describe this situation:
Larry read a
400-page book.
He read at a rate of
10 pages per day for days.
Are both trapezoids and parallelograms quadrilaterals?
Solve the equation:
Sheniqua is playing several rounds of a card game.
Answer the question about a situation that can be represented with the expression
.

Did Sheniqua earn or lose 70 points in one of the card game rounds?
Goblins

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