Daily Math Review: Last Term
Year 3 Mathematics Place Value and Number Operations Let's Review What We've Learned!
Place Value Houses
Every digit has a special place Thousands, Hundreds, Tens, Ones Each place is worth 10 times more than the place to its right We can build houses to show place value
Build Your Place Value House
Look at the number 2,456 Which digit lives in the thousands house? Which digit lives in the hundreds house? Which digit lives in the tens house? Which digit lives in the ones house?
Decimals in Our Place Value House
Decimals are parts of a whole They live to the right of the decimal point Tenths place comes first after the decimal Hundredths place comes next
Expanded Form
Breaking numbers into their parts Shows the value of each digit Example: 1,234 = 1,000 + 200 + 30 + 4 Helps us understand what numbers really mean
Expanded Form Practice
Write 3,567 in expanded form Remember: look at each digit's place What is the value of the 3? What is the value of the 5? What is the value of the 6? What is the value of the 7?
Counting Groups in Numbers
{"left":"How many tens are in 340?\nHow many hundreds are in 2,800?\nHow many thousands are in 15,000?","right":"34 tens make 340\n28 hundreds make 2,800\n15 thousands make 15,000"}
Addition Strategies We Know
Break-up strategy: Break numbers into parts Compatible numbers: Find friendly pairs Rounding: Round to nearest 10, 100, or 1000 These strategies make addition easier!
Addition Strategy Practice
Solve: 47 + 28 Try the break-up strategy first 47 = 40 + 7 28 = 20 + 8 40 + 20 = 60 7 + 8 = 15 60 + 15 = 75
Subtraction Strategies
Same strategies work for subtraction! Break-up: Break numbers into friendly parts Compatible numbers: Look for easy combinations Rounding: Round and adjust your answer
Let's Think Together
Which strategy would you use for 203 - 98? Why would rounding be helpful here? What would you round 98 to? How would you adjust your answer?
Great Work, Mathematicians!
You remembered place value houses You can write numbers in expanded form You know how to count groups in numbers You can use smart strategies for addition and subtraction Keep practicing these skills!