## BPS District Mathematics Standards

"I can ... statements"

In 1st grade, your child will build on last year’s work and gain important new skills. One of the most important outcomes for the year is to improve speed and accuracy adding with a sum of 20 or less and subtracting from a number 20 or less (e.g., 17 – 8). Another important goal in 1st grade is adding with a sum of 100 or less; this will rely on understanding what the digits mean in a number such as 63 (namely, 63 is six tens and three ones). Working with multi-digit addition this year will set the stage for 2nd grade, when your child will be working with three-digit numbers and adding and subtracting with larger numbers.

### MAT-01.OA Domain:

• MAT-01.OA.01 Use strategies to add and subtract within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions
• MAT-01.OA.02 Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20.
• MAT-01.OA.03 Apply properties of operations as strategies to add and subtract
• MAT-01.OA.04 Demonstrate understanding of subtraction as an unknown-addend problem
• MAT-01.OA.05 Relate counting to addition and subtraction
• MAT-01.OA.06 Use strategies to add and subtract within 20. Fluently add and subtract within 10.
• MAT-01.OA.07 Demonstrate understanding of the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false
• MAT-01.OA.08 Determine the unknown whole number in an addition or subtraction equation that uses three whole numbers.

### MAT-01.NBT Domain:

• MAT-01.NBT.01 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.
• MAT-01.NBT.02 Demonstrate understanding that the two digits of a two-digit number represent amounts of tens and ones, including
• MAT-01.NBT.02.a 10 can be thought of as a bundle of ten ones - called a ten.
• MAT-01.NBT.02.b The numbers from 11 to 19 are composed of a ten and additional ones.
• MAT-01.NBT.02.c Multiples of 10 up to 90 represent a number of tens and 0 ones.
• MAT-01.NBT.03 Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >,=, and <.
• MAT-01.NBT.04 Demonstrate understanding of place value when adding two-digit numbers within 100. Use concrete models or drawing strategies based on place value, properties of operations, and/or the relationship between addition and subtraction to add and subtract within 100. Relate the strategy to a written method and explain the reasoning used.
• MAT-01.NBT.05 Mentally add or subtract 10 to or from a given two-digit number. Explain the reasoning used
• MAT-01.NBT.06 Use concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction to subtract multiples of 10 in the range of 10-90 from multiples of 10 in the same range resulting in a positive or zero difference. Use a written method to explain the strategy.

### MAT-01.MD Domain:

• MAT-01.MD.01 Order three objects by length. Compare the lengths of two objects indirectly by using a third object.
• MAT-01.MD.02 Demonstrate understanding that the length measurement of an object is the number of same-size length units that span the object with no gaps or overlaps. Measure and express the length of an object using whole non-standards units.
• MAT-01.MD.03 Tell and Write time to the hour and half-hour using analog and digital clocks
• MAT-01.MD.04 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
• MAT-01.MD.05 Identify and tell the value of a dollar bill, quarter, dime, nickel, and penny
• MAT-01.MD.06 Count and tell the value of combinations of dimes and pennies up to one dollar

### MAT-01.G Domain:

• MAT-01.G.01 Distinguish between defining attributes versus non-defining attributes. Use defining attributes to build and draw two-dimensional shapes (squares, circles, triangles, rectangles, trapezoids, rhombuses, pentagons, hexagons, octagons).
• MAT-01.G.02 Compose a new shape or solid from two-dimensional shapes and/or three-dimensional solids (squares, circles, triangles, rectangles, trapezoids, rhombuses, pentagons, hexagons, octagons, cubes, spheres, cylinders, cones, triangular prisms, and rectangular prisms).
• MAT-01.G.03 Partition circles and rectangles into two equal shares. Describe the shares using the word halves, and Use the phrase half of. Describe the whole as two of the shares

### A Sample of What Your Child Will Be Working on in Grade 01

• Solving addition and subtraction word problems in situations of adding to, taking from, putting together, taking apart, and comparing (e.g., a taking from situation would be: “Five apples were on the table. I ate some apples. Then there were three apples. How many apples did I eat?”)
• Adding with a sum of 20 or less, and subtracting from a number 20 or less, for example by using strategies based around the number 10 (e.g., to solve 13 – 4, one can start with 13, subtract 3 to reach 10, and then subtract 1 more to reach 9)
• Quickly and accurately adding with a sum of 10 or less, and quickly and accurately subtracting from a number 10 or less (e.g., 2 + 5, 7 – 5)
• Understanding what the digits mean in two-digit numbers (place value)
• Using understanding of place value to add and subtract (e.g., 38 + 5, 29 + 20, 64 + 27, 80 – 50)
• Measuring lengths of objects by using a shorter object as a unit of length
• Making composite shapes by joining shapes together, and dividing circles and rectangles into halves or fourths