M A TH Check Out These Books! M A T T E RS
Second Grade 2014-2015 First Nine Weeks Volume 4, Issue 1
Math Resources and Ideas for Families During these nine weeks, second graders are learning to:
Skip count using 5’s, 10’s, and 100’s up to 1000.
Add and subtract within 100 using different strategies. Your child is learning to add and subtract
Second graders need to be able to start at another number besides 1 and be able to skip count to a given number. For example, a child should be able to count by tens starting at 120 and go to 250.
Welcome! This newsletter will be sent home to families every nine weeks. It will provide information on what your child is learning in math, activities you can do at home to reinforce the content, and suggestions for books and resources you can use to help your child with math.
using drawings or objects. See “Addition and Subtraction Strategies” for more information on strategies you may see your child use.
Use addition and subtraction strategies to solve one- and two-step word problems within a hundred. For example, Patrick has 27 stickers. Brandon has 34 stickers. If they put their stickers together, how many more will they need to have 100 stickers? This problem is a two-step problem because students must first add the two numbers together and then figure out how far it is to 100.
Fluently add and subtract within 20 using mental strategies. By the end of second grade, children are
Addition and Subtraction Strategies
Students will learn a variety of strategies to solve addition and subtraction problems. Notice the standard algorithm, the borrowing/carrying strategy most of us were taught in school, is not a strategy listed below because it is not appropriate for second graders.
Place Value Strategy — When solving 35+14 a student would add 30+10=40; 5+4=9; 40+9=49.
Relationship between Addition and Subtraction — When solving 50-24=?, a child could also think of it as 24+?=50 and add up until he reaches 50.
Decomposing Numbers — When solving 55-28, a child could break 28 into 20+8. To solve, first do 55-20=35. Then subtract or count back 8 to get 27.
Using Easier Numbers to Solve — When solving 45-29, a child might recognize that 29 is one away from 30, an easier number to work with. The child could subtract 45-30=15. Because she took away 1 too many, she would then add on 1 to 15 to get the answer of 16.
expected to memorize all the combinations up to 20.
Measure the length of an object twice using different length units. Explain why the measurement of the same object taken with two different units is different. Second graders will measure objects using two different units such as inches and centimeters. They are learning to explain the difference by looking at the size of the unit and noticing that the inch unit is bigger, therefore it will take less to measure the length of an object. The centimeter unit is smaller; therefore you will need more centimeters to measure the length of the same object.
Tell and write time to the nearest five minutes using an analog and digital clock using a.m. and p.m.
Solve word problems involving lengths that have equations with an unknown number. For example, “During week 1, a plant measured 6 inches. During the next three weeks, it grew. During week 4, the plant measured 12 inches. How many inches did it grow? The equation to represent this problem could be 6 + ? = 12
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Math Resources and Ideas for Families
Activities to Try at Home
Online Activities to Try
http://www.abcya.com/math_facts_game .htm Practice addition and subtraction facts with this fun basketball game. http://www.oswego.org/ocsdweb/games/ghostblasters1/gbcd.html Blast the ghosts as you practice skip counting. Click on the ghost to pick the number you want to count by. http://www.abcya.com/telling_time.htm Practice telling time with this fun game. http://www.abcya.com/math_man_subtra ction_jr.htm Play this Pac-Man™ like game as you practice subtraction facts. http://www.funbrain.com/measure/ Practice measuring with this game. Pick easy inches or easy centimeters. http://www.pbs.org/parents/education/m ath/games/first-second-grade/time-tomove/ Practice measuring fish with this fishing game.
Practice counting by 5’s, 10’s, and 100’s up to 500. Once your child is able to count by 5’s, 10’s, and 100’s, practice starting at a number other than one. For example, count by tens starting at 170 until you hit 300.
Use addition and subtraction flash cards to help your child become fluent with math combinations. Stores such as the Dollar Tree and Walmart have premade cards or you can use index cards and make your own.
Provide your child with the opportunity to practice telling time. Children have lots of experience telling time with digital clocks, but need practice with analog (clocks with hands).
Practice measuring objects around the house with your child. Measure to the nearest inch and then measure again using centimeters. Talk with your child about what he notices about the two different measurements.
Check Out These Books! Visit the Louisville Free Public Library to check out these books which connect to math content students are learning this month.
QR Code – scan our QR code and visit our site for more information, activities, and apps. Visit at: www.jcpsmath.weebly.com
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Bears Odd, Bears Even by Harriet Ziefert
Addition by Sheila Cato
Count Your Chickens by Daniel Jacobs
Pet Store Subtraction by Simone Ribke
Measurement by Penny Dowdy
Measuring by Marcia Gresko
Measure by Measure by Marilyn Deen