MATHEMATICS2 Q2 3 solve problems involving addition with sums .pptx

Adding Up to 1000:
Mastering Addition with and
without Regrouping

Welcome to Addition Adventure!
● Today we're going to
learn about adding big
numbers
● We'll practice with
money too
● Are you ready to
become addition
experts?

What is Addition?
● Addition means putting
things together
● We use the plus sign (+)
for addition
● The answer in addition
is called the sum
● Can you think of times
when you use addition in
real life?

Adding Without Regrouping
● Sometimes we can add numbers
easily
● We start from the right and add each
column
● Example: 234 + 321 = 555
● Let's try one together: 412 + 586 = ?

Understanding Place Value
● Numbers have different
values based on their
position
● Ones are on the right
● Then tens, then hundreds
● Why do you think place
value is important in
addition?

What is Regrouping?
● Sometimes when we add, we get more
than 9 in a column
● We need to move some to the next
column
● This is called regrouping or carrying
● Have you heard of regrouping before?

Regrouping in Action
● Let's add 178 + 456
● 8 + 6 = 14, so we
regroup
● We write 4 in ones
and carry 1 to tens
● Can you finish
solving this problem?

Practice Time: Regrouping
●Try these problems:
●329 + 468 = ?
●567 + 298 = ?
●Which one was harder? Why?

Adding Money
● We can use addition with money too
● Remember: 100 cents = 1 dollar
● We use a decimal point to separate
dollars and cents
● What coins do you know?

Money Addition Without Regrouping
●Let's add $2.45 + $3.54
●Line up the decimal points
●Add cents, then dollars
●What's the answer?

Money Addition With Regrouping
●Now let's try $5.75 + $2.80
●75 cents + 80 cents = 155 cents
●That's more than a dollar!
●We regroup to get $8.55
●Can you explain why?

Real-Life Money Problems
● You have $4.25 and find $2.75. How
much do you have now?
● A toy costs $12.50. You have $20.
How much change will you get?
● Which problem was easier? Why?

Adding Three Numbers
● We can add more than two
numbers at once
● Start from the right, just like
before
● Example: 123 + 456 + 210 = 789
● Try this: 325 + 142 + 231 = ?

Challenge: Three-Number Money
Addition
● Let's add $4.25 + $3.50 + $2.75
● Remember to line up the decimal
points
● Add one column at a time
● What's the total?

Mental Math Tricks
● Sometimes we can add quickly in our
heads
● Adding 10: just increase the tens digit
● Adding 100: increase the hundreds digit
● How would you add 10 to 479 mentally?

Estimating Sums
● We can estimate to check if
our answer makes sense
● Round numbers to the
nearest 10 or 100
● Example: 328 + 295 is about
300 + 300 = 600
● Why is estimating useful?

Word Problems
● Sam has 345 stickers. Jill gives him 287
more. How many does he have now?
● A school has 523 boys and 418 girls. How
many students in total?
● Which information helps you solve each
problem?

Addition Strategies
● Use a number line
● Break numbers into easier
parts
● Use objects or drawings
● Which strategy do you like
best?

Review Time!
● We learned about adding up to 1000
● We practiced with and without
regrouping
● We added money too
● What was your favorite part of the
lesson?

You're Addition Superstars!
● You've learned so much
about addition
● Keep practicing to get even
better
● Addition is useful in
everyday life
● What will you add up next?

Welcome Back, Addition Explorers!
● We're going to learn even
more about addition
● Get ready for fun
activities and challenges
● What do you remember
from our last lesson?

Adding by Making 10
● Sometimes it's easier to add by making
groups of 10
● Example: 8 + 5 = 8 + 2 + 3 = 10 + 3 = 13
● How would you use this strategy for 9 +
6?

Number Bonds
● Number bonds show
how numbers are
related
● They help us see
parts of a whole
● Can you make a
number bond for 10?

Addition with a Number Line
● We can use a number line to add
● Start at the first number, then jump
forward
● Try 24 + 35 on a number line
● How many jumps did you make?

Doubles and Near Doubles
● Doubles are easy to remember:
5 + 5, 6 + 6
● Near doubles are close:
6 + 7 is like 6 + 6 + 1
● What's the near double for 7 + 8?

Adding Three-Digit Numbers
● Remember to line up the place
values
● Start from the right (ones column)
● Regroup when needed
● Let's try 352 + 429 together

Addition Word Problem Fun
● Sara has 234 marbles. Tom gives her 158
more.
● How many marbles does Sara have now?
● What information do we need to solve this?

Making Change Game
● You're the shopkeeper!
● An item costs $3.75. A
customer pays with
$5.00
● How much change do
you give?
● Practice with a partner

Addition Scavenger Hunt
● Look around the classroom
● Find items you can count and add
● Example: 12 pencils + 15 markers =
27 writing tools
● What can you find to add?

Adding with Arrays
● Arrays show objects in
rows and columns
● They help us add quickly
● 3 rows of 4 is the same
as 4 + 4 + 4 = 12
● Can you make an array
for 5 x 3?

Addition Patterns
● Numbers follow patterns when we add
● Adding 1 makes the next counting
number
● Adding 10 changes only the tens place
● What happens when you add 100?

Fact Families
● Fact families show
related addition facts
● Example: 3 + 5 = 8, 5 +
3 = 8
● Can you make a fact
family for 2, 6, and 8?

Addition with Base 10 Blocks
● Base 10 blocks show place value
● Use them to add visually
● Try 234 + 152 with blocks
● How does this help you understand
regrouping?

Mental Math: Adding 9
●To add 9, add 10 and subtract 1
●26 + 9 is like 26 + 10 - 1 = 35
●Try 45 + 9 in your head
●What other mental math tricks
do you know?

Addition Bingo
● Let's play Addition Bingo!
● Your card has sums instead
of numbers
● Listen for addition problems
● Mark the sum if you have it
● Who will get Bingo first?

Creating Your Own Word Problems
● Think of a situation where you use addition
● Write a word problem about it
● Trade with a partner and solve each other's
problems
● Was it easier to write or solve the problem?

Addition with Money:
Shopping Game
● You have $10 to spend at the class store
● Items have different prices
● Add up your items' costs
● How much did you spend? How much
change?

Estimating Sums with Money
● Sometimes we need to
guess total costs
● Round prices to the nearest
dollar
● Estimate: $3.75 + $2.20 +
$4.50
● How close was your
estimate to the exact sum?

Addition Relay Race
● Form teams and line up
● Each person solves one addition problem
● Pass the baton (pencil) to the next person
● Which team can finish first and correctly?

Congratulations, Addition Masters!
● You've learned so much
about addition
● Remember to practice your
new skills
● Addition is a tool you'll use
every day
● What was your favorite
new addition trick?

Question 1
● What is 345 + 278?
● A) 513
● B) 623
● C) 713
● D) 523
● Choose the best answer!

Question 2
● Sally has $4.25 and finds
$2.75. How much money
does she have now?
● A) $6.00
● B) $7.00
● C) $6.50
● D) $7.50
● Which answer is correct?

Question 3
● A class has 23 boys and 19 girls. How
many students are in the class?
● A) 41
● B) 42
● C) 43
● D) 44
● Can you figure out the total?

Question 4
● What is 456 + 329?
● A) 775
● B) 785
● C) 795
● D) 805
● Use your addition
skills to solve this!

Question 5
● An apple costs $0.50 and a
banana costs $0.30. How much
do 3 apples and 2 bananas
cost?
● A) $1.90
● B) $2.00
● C) $2.10
● D) $2.20
● Add up the fruits to find the
answer!

Question 6
● What number comes next: 178, 188, 198,
___?
● A) 208
● B) 218
● C) 228
● D) 238
● Look for the pattern to solve this one!

Question 7
● Tom has 145 toy cars. His friend
gives him 78 more. How many cars
does Tom have now?
● A) 213
● B) 223
● C) 233
● D) 243
● Add it up to find Tom's new total!

Question 8
● Estimate the sum of 392
+ 245:
● A) 600
● B) 650
● C) 700
● D) 750
● Round the numbers to
make a good guess!

Question 9
● What is 567 + 298?
● A) 855
● B) 865
● C) 875
● D) 885
● Remember to regroup if needed!

Question 10
● If you add 10 to 479, what
number do you get?
● A) 489
● B) 499
● C) 579
● D) 589
● Think about place value to
solve this quickly!

Answer Key
● 1. B) 623
● 2. B) $7.00
● 3. B) 42
● 4. B) 785
● 5. C) $2.10
● 6. A) 208
● 7. B) 223
● 8. B) 650
● 9. B) 865
● 10. A) 489
● How many did you get right? Great job on completing the quiz!

MATHEMATICS2 Q2 3 solve problems involving addition with sums .pptx

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MATHEMATICS2 Q2 3 solve problems involving addition with sums .pptx