Decimals and Addition Made Easy
Year 4 Mathematics Understanding Tenths and Hundredths Adding Decimals with Confidence
What We'll Learn Today
Identify and read tenths and hundredths as decimals Understand how decimals connect to fractions Add decimals to one decimal place Use decimals in real-world situations
New Zealand Curriculum Connection
Number and Algebra Strand - Understanding decimals Level 2 Achievement - Adding decimals to one place Key Competencies - Mathematical thinking and reasoning Real-world problem solving with decimals
Meet the Decimal Place Value House!
Number and Algebra Strand - Understanding decimals Level 2 Achievement - Adding decimals to one place Key Competencies - Mathematical thinking and reasoning Real-world problem solving with decimals
Activity 1: Showing Tenths and Hundredths
Use fraction walls to see 0.3 = 3/10 Draw decimals on number lines Write the decimal and fraction for each picture Work with a partner to check answers
Activity 2: Adding Decimals on Number Lines
Start at the first decimal on the number line Jump forward by the second decimal amount Count the jumps: 0.4 + 0.3 = 0.7 Practice: 0.5 + 0.2 and 0.6 + 0.1
Quick Check: What Did We Learn?
What does 0.6 mean in fractions? How do we add 0.3 + 0.4? Where would 0.8 live in our place value house? Can you think of a real-world example of decimals?
Teaching Strategies We Used
Visual aids - fraction walls and number lines Hands-on activities with manipulatives Peer discussion and cooperative learning Real-world connections to measurements Formative assessment with immediate feedback
Resources We Need
Fraction walls or printed fraction strips Number line posters and student sheets Decimal place value house diagrams Mini whiteboards and markers Counters or blocks for representing parts