What Your Child Will Learn Grade 2 Quarter 2:
Number and Operations in Base Ten & Operations and Algebraic Thinking
• Fluently add and subtract within 100.
• Explain why addition and subtraction strategies work.
• Fluently add and subtract within 20 using mental strategies.
By the end of Grade 2, know all sums of two one-digit numbers.
• Add up to four two-digit numbers.
• Add and subtract within 100 to solve one- and two-step word
problems.
• Use addition to find the total number of objects in rows and
columns.
ACTIVITIES AT HOME
VOCABULARY
• Skip count when counting groups of nickels and dimes.
• Count in a pattern while doing a rhythmic or repeated task – stirring
pancake batter, brushing hair, putting away groceries, walking.
• Roll two dice to make a two-digit number. Subtract it from 99 or 100.
• Represent two digit numbers with popsicle sticks - make bundles of
ten for the tens and use single sticks for the ones.
• Roll dice to make two or three digit numbers with a partner. See who
can make the larger number.
• Add all of the digits of your house number together.
• Compare prices of various items (gas, toys, etc) to find the lowest
amount.
• Make numbers or find numbers on labels and compare them.
• Find or roll numbers and write them in expanded form.
• Find or roll numbers and tell which place value each digit represents.
• Make a train with Legos or colored blocks. Write a number sentence
for the different colors in the train.
• Use small items (counters, beans, small toys) to represent number
sentences. Use index cards to make +, -, <, >, and = symbols. Show a
number sentence with a missing element: 7 + ___ = 12. Have your
student find the missing addend.
• Start with 100 counters (beans, pennies, etc.) and roll two dice to
make a 2-digit number. Subtract counters until you get to 0.
• Give your student an addition or subtraction number sentence and ask
them to make up a story problem to go with the number sentence.
Skip Count: to count in equal increments by 2s, 3s, 4s, 5s, or 10s
Expanded Form: a way of writing numbers to show place value
(346=300+40+6)
Numeral: a symbol used to represent a number
Addition:to join two or more groups. 2 + 3 = 5
Addend: a number that is added to another in an addition problem.
In 2 + 3 = 5, 2 and 3 are addends.
Sum: the answer to an addition problem. In 2 + 3 = 5, 5 it is the sum.
Number Sentence: A sentence that includes numbers, operation
symbols ( +,- ), and a greater than or less than symbol ( >,< ) or equal
sign. 5 + 3 = 8, 25 < 32
Subtraction: to find the difference when two groups are compared or to
find out how many are left when items are taken away from a group.
Difference: the answer to a subtraction problem. In 8 – 3 = 5, 5 is the
difference.
Equal sign (=): a symbol used to show that two amounts have the same
value. 384 = 384
Regroup: to exchange amounts of equal value to rename a number.
Decompose: to break a number into smaller parts to simplify
computation. Example: 15 = 10 + 5.
Compose: to put decomposed numbers back together. 10 + 5 = 15.
Array: an arrangement that shows objects in rows and columns.
 Elementary Mathematics Office, Howard County Public School System, 2012-2013
Visit http://smart.hcpss.wikispaces.net for HCPSS elementary mathematics program information.
What Your Child Will Learn Grade 2 Quarter 2:
Measurement and Data & Geometry
• Show whole numbers, sums, and differences on a number line
• Tell and write time to the nearest five minutes.
• Solve word problems involving dollar bills, quarters, dimes, nickels, and pennies.
• Partition a rectangle into rows and columns and count to find the total.
ACTIVITIES AT HOME
VOCABULARY
• Look at a TV guide and locate the time a favorite show
Number Line: a diagram that represents numbers as points on a
line
Analog Clock: a clock with numbers 1 to 12 around the face and
rotating hands to show the hour, minutes, and seconds
Digital Clock: a clock that uses numerals only to show the time
Minute: a unit of time equal to 60 seconds
Hour: a unit of time equal to 60 minutes
Quarter Hour: a unit of time that measures fifteen minutes
Half Hour: a unit of time that measures thirty minutes
Half Past: thirty minutes past the hour
Penny: a coin worth 1 cent
Nickel: a coin worth 5 cents
Dime: a coin worth 10 cents
Quarter: a coin worth 25 cents
Partition: to divide into parts
starts. Have your child find that time on an analog clock.
• Look through an ad in the paper to locate an item your
child would want (less than &10.00). Have your child count
out that much money, then ask them to make change from
a $10.00 bill.
• Have your child pick out two or three items in an ad, then
add the amounts together to see how much the items would
cost altogether.
 Elementary Mathematics Office, Howard County Public School System, 2012-2013
Visit http://smart.hcpss.wikispaces.net for HCPSS elementary mathematics program information.