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What does a student learn in ?

This is the year math grows into hundreds. Students start thinking in groups of ten and groups of one hundred, so a number like 348 means three hundreds, four tens, and eight ones. They add and subtract within 100 quickly in their heads, measure real objects with a ruler, tell time to the nearest five minutes, and count coins. By spring, they can read, write, and compare numbers up to 1,000.

  • Place value
  • Adding and subtracting
  • Word problems
  • Measurement
  • Telling time
  • Money
  • Shapes and fractions
Source: Mississippi Mississippi College- & Career-Readiness Standards
Mastery Learning Standards
The required skills a student should display by the end of Grade 2.
Operations and Algebraic Thinking
  • Represent and solve problems involving addition and subtraction

    2.OA.A

    Students practice adding and subtracting to solve word problems. They figure out what operation to use, set up the math, and find the answer.

  • Use addition and subtraction within 100 to solve one- and two-step word…

    2.OA.1

    Students read short story problems and figure out a missing number using addition or subtraction up to 100. The missing number might show up anywhere in the problem, so students draw pictures or write equations to find it.

  • Add and subtract within 20

    2.OA.B

    Students practice adding and subtracting pairs of numbers up to 20 until the answers come quickly from memory, the same way they learn to recognize letters on sight.

  • Fluently add and subtract within 20 using mental strategies

    2.OA.2

    Adding and subtracting small numbers quickly, without counting on fingers or using objects. By the end of second grade, students recall answers like 7 + 8 or 9 + 6 from memory.

  • Work with equal groups of objects to gain foundations for multiplication

    2.OA.C

    Students sort objects into equal groups and count how many groups there are. This hands-on work builds the thinking behind multiplication before the formal math begins.

  • Determine whether a group of objects

    2.OA.3

    Students decide if a group of up to 20 objects is odd or even by pairing them up or counting by 2s. For even numbers, they write an addition equation that shows two equal groups, like 6 = 3 + 3.

  • Use addition to find the total number of objects arranged in rectangular arrays…

    2.OA.4

    Students count objects arranged in a grid, like rows of stickers or dots, then write an addition sentence that adds each row as a group. Arrays go up to 5 rows and 5 columns.

Number and Operations in Base Ten
  • Understand place value

    2.NBT.A

    Reading and writing numbers up to 1,000 by understanding that each digit's position tells you its value. A 3 in the hundreds place means 300, not 3.

  • Understand that the three digits of a three-digit number represent amounts of…

    2.NBT.1

    Students learn that every three-digit number is built from hundreds, tens, and ones. The number 706, for example, means 7 hundreds, 0 tens, and 6 ones.

  • 100 can be thought of as a bundle of ten tens — called a "hundred."

    2.NBT.1.a

    Ten groups of ten make one hundred. Students learn to see 100 not just as a number but as a tidy bundle, the same way ten dimes make a dollar.

  • The numbers 100, 200, 300, 400, 500, 600, 700, 800, 900 refer to one, two…

    2.NBT.1.b

    Round numbers like 300 or 700 are just a count of hundreds with nothing left over. Students learn that 500 means exactly five hundreds, zero tens, and zero ones.

  • Count within 1000; skip-count by 5s, 10s

    2.NBT.2

    Students count up to 1,000 and practice skip-counting by 5s, 10s, and 100s, like reading a clock by fives or counting coins and dollar bills by tens and hundreds.

  • Read and write numbers to 1000 using base-ten numerals, number names

    2.NBT.3

    Students read and write numbers up to 1,000 three ways: as digits (456), as words (four hundred fifty-six), and broken into parts that show hundreds, tens, and ones (400 + 50 + 6).

  • Compare two three-digit numbers based on meanings of the hundreds, tens

    2.NBT.4

    Students look at two three-digit numbers, decide which is bigger or smaller by checking the hundreds, tens, and ones places, then write the result using the symbols >, <, or =.

  • Use place value understanding and properties of operations to add and subtract

    2.NBT.B

    Adding and subtracting two- and three-digit numbers by thinking about hundreds, tens, and ones. Students learn why regrouping works, not just how to do it.

  • Fluently add and subtract within 100 using strategies based on place value…

    2.NBT.5

    Adding and subtracting any two numbers up to 100, without counting on fingers. Students use what they know about tens and ones to get the answer quickly and confidently.

  • Add up to four two-digit numbers using strategies based on place value and…

    2.NBT.6

    Students add up to four two-digit numbers at once by grouping tens together and ones together before combining them. It is the same thinking behind adding a column of prices or scores by hand.

  • Add and subtract within 1000, using concrete models or drawings and strategies…

    2.NBT.7

    Students add and subtract numbers up to 1000 by breaking them into hundreds, tens, and ones. When the pieces don't line up evenly, students regroup, the way you carry or borrow in the standard written method.

  • Mentally add 10 or 100 to a given number 100–900

    2.NBT.8

    Students add or subtract 10 and 100 in their heads, without writing anything down. Given a number like 450, they can quickly land on 460 or 350.

  • Explain why addition and subtraction strategies work, using place value and the…

    2.NBT.9

    Students explain *why* a math strategy works, not just whether it gives the right answer. They use what they know about tens and ones to show the reasoning behind adding or subtracting.

Measurement and Data
  • Measure and estimate lengths in standard units

    2.MD.A

    Students measure objects using rulers and measuring tapes, working in inches, feet, centimeters, and meters. They also practice making reasonable guesses about length before measuring.

  • Measure the length of an object by selecting and using appropriate tools such…

    2.MD.1

    Students pick the right tool for the job, such as a ruler for a pencil or a measuring tape for a desk, and use it to find how long something is.

  • Measure the length of an object twice, using length units of different lengths…

    2.MD.2

    Students measure the same object twice using two different tools, like a ruler marked in inches and one marked in centimeters. They explain why the numbers differ: smaller units give a bigger count, larger units give a smaller one.

  • Estimate lengths using units of inches, feet, centimeters

    2.MD.3

    Students guess how long something is before measuring it, using units like inches, feet, centimeters, or meters. The goal is building a feel for size so the measurement makes sense when they check it.

  • Measure to determine how much longer one object is than another, expressing the…

    2.MD.4

    Students measure two objects and figure out the difference in length between them. For example, they might find that a pencil is 3 inches longer than an eraser.

  • Relate addition and subtraction to length

    2.MD.B

    Students use a ruler or number line to add and subtract lengths. If one path is 8 inches and another is 5 inches, they find how much longer one is or how far they stretch combined.

  • Use addition and subtraction within 100 to solve word problems involving…

    2.MD.5

    Students solve simple story problems about length by adding or subtracting measurements. For example, they might figure out how much longer one ribbon is than another using a drawing or a number sentence with a missing number.

  • Represent whole numbers as lengths from 0 on a number line diagram with equally…

    2.MD.6

    Students use a number line to show addition and subtraction. They mark evenly spaced points starting at 0 and use jumps along the line to find sums and differences up to 100.

  • Work with time with respect to a clock and a calendar

    2.MD.C

    Students read time on a clock and use a calendar to track days and dates. They also count coins and bills to find totals.

  • Tell and write time from analog and digital clocks to the nearest five minutes…

    2.MD.7

    Students read both analog and digital clocks and write the time to the nearest five minutes. They also label the time as a.m. or p.m. to show whether it falls in the morning or afternoon.

  • Solve word problems involving dollar bills, quarters, dimes, nickels

    2.MD.8.a

    Students solve story problems using a mix of coins and dollar bills, writing the answer with the right symbol, like $1.25 or 47¢. They practice figuring out totals and making change with real money amounts.

  • Fluently use a calendar to answer simple real world problems such as "How many…

    2.MD.8.b

    Students read a calendar to answer everyday questions, like figuring out how many weeks fall in a year or how much money someone saves over several months.

  • Generate measurement data by measuring lengths of several objects to the…

    2.MD.9

    Students measure a group of objects with a ruler, then plot each measurement as a dot on a number line. The finished chart shows at a glance which lengths came up most often.

  • Draw a picture graph and a bar graph

    2.MD.10

    Students collect information, sort it into groups, and draw a picture graph or bar graph to show what they found. Then they use the graph to answer questions like how many in all or how many more one group has than another.

Geometry
  • Reason with shapes and their attributes

    2.G.A

    Students sort and describe shapes by their sides, angles, and other features. They learn that a square is always a rectangle, and that triangles can look very different from each other.

  • Recognize and draw shapes having specified attributes, such as a given number…

    2.G.1

    Students sort and draw shapes by counting their sides and corners. They name triangles, four-sided shapes, five-sided shapes, six-sided shapes, and cubes.

  • Partition a rectangle into rows and columns of same-size squares and count to…

    2.G.2

    Students divide a rectangle into equal-sized squares arranged in rows and columns, then count all the squares to find the total. It's an early look at how multiplication and area work.

  • Partition circles and rectangles into two, three

    2.G.3

    Students cut circles and rectangles into equal pieces and name those pieces: halves, thirds, or fourths. They also learn that two shapes can each be split in half without the halves looking identical.