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Mrs. Galusha's Gremlins

"Tell me and I forget.  Teach me and I may remember.  Involve me and I LEARN."  Benjamin Franklin

Grade 2 Math Standards

Grade 2

Quarter 1 Math Concepts 

  • Solve one-step addition story problems with sums to 100 involving situations of adding to and putting together with unknowns in all positions

  • Solve one-step subtraction problems with minuends to 100 involving situations of taking from, taking apart, and comparing, with unknowns in all positions. 

  • Fluently add and subtract with sums and minuends to 20 using mental math strategies

  • Determine whether a group of objects (up to 20) has an odd or even number of members by pairing objects or counting them by 2s. 

  • Write an equation to represent an even number as the sum of 2 equal addends

  • Find the total number of objects in an array with up to 5 rows and 5 columns, using addition

  • Write an equation to represent the total number of objects in an array with up to 5 rows and 5 columns as the sum of equal addends

  • Understand that the digits in a 3-digit number represent amounts of hundreds, tens, and ones

  • Understand that 100 can be thought of a bundle or group of 10 tens, called a hundred

  • Skip-count by 5s within 1,000

  • Skip-count by 10’s within 1,000

  • Read and write numbers to 1000 represented with numerals, number names, and expanded form.

  • Use strategies based on place value, properties of operations, or the relationship between addition and subtraction to add fluently with sums to 100.

  • Use strategies based on place value, properties of operations, or the relationship between addition and subtraction to add fluently with sums to 100.

  • Represent whole numbers as lengths, and whole-number sums on a number line.

  • Tell and write time to the nearest 5 minutes on analog and digital clocks.

Quarter 2 Math Concepts 

*Solve one- and two-step addition and subtraction story problems involving situations of adding to, putting together, taking from, taking apart, and comparing (with unknowns in all positions).

​*Demonstrate an understanding that the digits in a two-digit number represent amounts of tens and ones.

*Skip count by fives and tens within 1,000.

*Use strategies based on place value, properties of operations, or the relationship between addition and subtraction to add and subtract fluently with sums and minuends to 100.

*Add three 2-digit numbers using strategies based on place value and properties of operations.

*Explain why strategies for adding and subtracting two-digit numbers work using place value and the properties of operations.

*Solve addition story problems with sums to 100 involving lengths given in the same units.

*Represent whole numbers as lengths on a number line.

*Represent whole-number sums and differences within 100 on a number line diagram.

*Solve one- and two-step addition and subtraction story problems involving situations of adding to, putting together, and comparing (with unknowns in all positions).

*Add three 2-digit numbers.

*Select and use the appropriate tool for measuring the length of an object.

*Describe how the size of the unit used to measure an object’s length relates to the measurement of the object’s length.

*Estimate length in inches.

*Measure length to the nearest whole unit in customary units.

*Determine exactly how much longer one object is than another, and express the difference between two lengths in terms of a standard unit of length.

*Solve addition and subtraction story problems with sums and minuends to 100 involving lengths given in the same units.

   Quarter 3 Math Concepts 

*Count within 1,000 (starting and ending with any given pair of numbers).
 
*Skip count by hundreds up to 1,000.
 
*Read and write numbers to 1,000 using base-10 numerals.
 
*Compare pairs of three-digit numbers.
 
*Add and subtract with sums and minuends to 1,000.
 
*Mentally add or subtract 100 to or from any 3-digit number between 100 and 999.
 
*Represent whole numbers, sums, and differences as lengths on a number line
 
*Read and write numbers to 1,000 represented with numerals and words.

*Use strategies based on place value, properties of operations, or the relationship between addition and subtraction to add with sums to 1,000 and subtract with minuends to 1,000.
 
*Solve money story problems involving dollar bills, quarters, dimes, nickels, and pennies.
 
*Use dollar and cent symbols when solving money story problems.

*Make sense of problems, and persevere in solving them.

*Model with mathematics.

*Attend to precision.

*Look for and make use of structure.

*Create a composite shape by composing two-dimensional shapes.

*Recognize shapes having specified attributes.

*Identify triangles, quadrilaterals (trapezoids and rhombuses), and hexagons.

  Quarter 4 Math Concepts 

*Solve one and two step addition and subtraction story problems with sums and minuends to 100 involving adding to, putting together, taking from, taking apart, and comparing with unknowns in all positions.

*Find the total number of objects in an array with up to five rows and five columns, using addition.

*Write an equation to represent the total number of objects in an array with up to five rows and five columns as the sum of equal addends.

*Read and write numbers to 1,000 using base 10 numerals, words, and expanded form.

*Compare pairs of three digit numbers, based on the understanding of what the digits in the hundreds, tens, and ones place represent and use <, =, and > symbols to record comparisons of two 3 digit numbers.

*Use concrete models or drawings to add and subtract with sums and minuends to 1,000.

*Use strategies based on place value, properties of operations, or the relationship between addition and subtraction to add and subtract with sums and minuends to 1,000.

*Use written numbers and symbols to represent strategies for adding and subtracting with sums and minuends to 1,000.

*Add with sums to 1,000 using strategies that involve adding 100's to 100's, 10's to 10's, and 1's to 1's.

*Add with sums to 1,000 using strategies the involve composing a hundred or a ten.

*Subtract with minuends to 1,000 using strategies that involve subtracting 100's from 100's, 10's from 10's, and 1's from 1's.

*Subtract with minuends to 1,000 using strategies that involve decomposing a hundred or a ten.

*Explain why strategies for adding and subtracting 2 and 3 digit numbers work, using place value and the properties.

*Select and use the appropriate tools for measuring the length of an object.

*Measure the length of an object in centimeters and meters using rulers, yard sticks, meter sticks, and measuring tapes.

*Estimate length in inches, feet, centimeters, and meters.

*Determine exactly how much longer one object is than another and express the difference between two lengths in terms of a standard unit of length.

*Use addition and subtraction within 100 to solve word problems involving lengths that are given in the same unit.

*Solve money story problems involving pennies, nickels, dimes, quarters and dollar bills using the dollar sign symbol and cent sign symbol when doing so.

*Make a line plot to show measurement data, with a horizontal scale marked in whole number units.

​*Partition a rectangle into rows and columns of same size squares and count to find the total number of them.

*Describe whole circles and rectangles as 2 of 2 equal parts or 4 of 4 equal parts.

*Use the terms halves and half, fourths, quarters, fourth of, and quarter of to talk about the two or four equal parts into which circles and rectangles have been partitioned.