What does a student learn in StateLouisiana,GradeGrade 2,SubjectMathematics?

Students use addition and subtraction to solve word problems, working with numbers up to 100. They figure out how many are left, how many more are needed, or how many there are in all.

Students solve short story problems using addition and subtraction with numbers up to 100. The missing number can show up anywhere in the problem, so students practice finding what's added, what's taken away, or what the total is.

Students add and subtract numbers up to 20 quickly and accurately, building the mental math habits they will use every day in higher grades.

Students add and subtract numbers up to 20 quickly in their heads, without counting on fingers. By the end of second grade, they have all basic addition facts memorized cold.

Students sort objects into equal groups and count how many are in each, building the groundwork for multiplication before it's formally introduced.

Students figure out if a group of up to 20 objects is odd or even by pairing them up or counting by twos. For even numbers, they write an addition sentence showing two equal groups, like 6 = 3 + 3.

Students count objects arranged in rows and columns (like a grid of dots or stamps) and write an addition equation to find the total. A 3-by-4 grid, for example, becomes 4 + 4 + 4 = 12.

Students learn that where a digit sits in a number changes its value. The 2 in 29 means something very different from the 2 in 200.

Students learn that every three-digit number is built from hundreds, tens, and ones. The number 347, for example, means 3 hundreds, 4 tens, and 7 ones.

Students learn that ten groups of ten ones make a hundred. That bundling idea is the foundation for reading and writing three-digit numbers.

Hundreds are built from groups of one hundred. Students learn that 300 means three groups of a hundred, 700 means seven groups, and so on, with nothing left over in the tens or ones place.

Students count up to 1,000 and practice skip-counting by 5s, 10s, and 100s, like jumping from 35 to 45 to 55 on a number line.

Students read and write numbers up to 1,000 three ways: as a numeral (347), as words (three hundred forty-seven), and in expanded form (300 + 40 + 7).

Students look at two three-digit numbers and decide which is larger, smaller, or equal by comparing the hundreds, then tens, then ones. They record the result using the symbols >, =, or <.

Students use what they know about hundreds, tens, and ones to add and subtract numbers up to 1,000. That includes working with regrouping, mental math shortcuts, and written methods.

Adding and subtracting any two numbers up to 100, quickly and accurately. Students use what they know about tens and ones to choose a strategy that works, not just memorize steps.

Students add as many as four two-digit numbers in a single problem by grouping tens together and combining the ones. The numbers stay manageable because students work with the parts they already know.

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 a ten into the next column or borrow one back.

Students add or subtract 10 or 100 from a three-digit number in their heads, without pencil or paper. The hundreds digit or tens digit changes by one, and the rest of the number stays the same.

Students explain *why* a math strategy works, not just whether it got the right answer. They might show why breaking a number into tens and ones makes adding easier.

Students measure real objects using rulers and measuring tapes, then practice making close guesses about length before measuring. The focus is on standard units like inches and centimeters.

Students pick the right measuring tool for the job and use it to find how long something is. A short pencil calls for a ruler; a longer stretch calls for a tape measure or yardstick.

Students measure the same object twice using two different tools, like a ruler marked in inches and one marked in centimeters. Then they explain why the numbers differ depending on which unit they used.

Students guess how long something is before measuring it, using inches, feet, centimeters, or meters. It builds the number sense that keeps measurements from looking wrong later.

Students measure two objects and subtract to find the difference. For example, if a pencil is 7 inches and a crayon is 4 inches, students say the pencil is 3 inches longer.

Students use addition and subtraction to solve everyday measuring problems, like figuring out how much longer one object is than another or finding a total length when two measurements are combined.

Students solve story problems about measuring lengths by adding or subtracting, using ruler sketches or simple equations to find the missing number. All lengths use the same unit, and answers stay within 100.

Students place whole numbers on a number line and use it to add and subtract. They mark equal spaces from 0, then hop forward or back to find sums and differences up to 100.

Students read clocks to tell time and count coins and bills to find totals. This cluster covers the everyday math of a clock face and a handful of change.

Students read both analog and digital clocks and write down the time to the nearest five minutes. They also label the time as a.m. or p.m. to show whether it falls before or after noon.

Students solve story problems using a mix of coins and dollar bills, then write the answer with the right symbol, $ or ¢. Think figuring out how much a snack costs or how much change you get back.

Students collect information, organize it into a picture graph or bar graph, and answer questions about what the data shows.

Students measure several objects with a ruler, record each length to the nearest whole number, and plot the results on a number line. The finished chart shows how all the measurements compare at a glance.

Students collect information sorted into up to four groups, then draw a picture graph or bar graph to show the results. They use the graph to answer questions like how many in all or how many more one group has than another.

Students sort and describe shapes by their sides, angles, and size. They partition shapes into equal parts and name those parts as halves, thirds, or fourths.

Students look at shapes and sort them by what they notice: how many corners, how many sides, how many flat faces. They also practice drawing shapes that match a description and name common ones like triangles, pentagons, and cubes.

Students divide a rectangle into equal 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.

Students cut circles and rectangles into equal pieces and name those pieces: halves, thirds, or fourths. They also learn that a whole can be split into equal shares more than one way, even if the pieces look different.