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SUBTRACTION (CLASS 1–5) - Coggle Diagram
SUBTRACTION (CLASS 1–5)
CLASS 1 – BASIC UNDERSTANDING
Meaning of Subtraction
Taking away objects
Finding how many are left
Comparing two groups
Finding the difference
Number Range
Small numbers up to 20
Strategies
Using objects and counters
Counting backward
Taking away using fingers
Using pictures
Number track
Symbols
Understanding − and =
Application
Simple subtraction in daily life
CLASS 2 – TWO-DIGIT SUBTRACTION
Number Understanding
Tens and ones
Breaking numbers into parts
Subtraction
One-digit subtraction
Two-digit subtraction
Subtraction without regrouping
Subtraction with regrouping
Strategies
Using beads and bundles
Number line
Counting backward
Counting forward to find the difference
Exchanging 1 ten for 10 ones
Application
Word problems
Money and change
Comparing quantities
CLASS 3 – THREE-DIGIT SUBTRACTION
Number Understanding
Hundreds, tens and ones
Expanded form
Subtraction
Two-digit subtraction
Three-digit subtraction
Subtraction without regrouping
Subtraction with regrouping
Strategies
Place-value chart
Bundles and sticks
Number line
Breaking numbers apart
Column method
Exchanging 1 hundred for 10 tens
Application
Money and measurement problems
Daily-life word problems
CLASS 4 – SUBTRACTION WITH THOUSANDS
Number Understanding
Thousands, hundreds, tens and ones
Expanded form
Subtraction
Larger-number subtraction
Four-digit subtraction
Subtraction without regrouping
Subtraction with regrouping
Subtraction involving zeros
Strategies
Place-value chart
Column method
Counting up
Mental calculation
Estimation
Application
Multi-step word problems
Money and measurement situations
Finding differences between quantities
CLASS 5 – FLEXIBLE SUBTRACTION
Number Understanding
Ten-thousands and other place values
Expanded form
Subtraction
Subtraction of larger numbers
Subtraction with regrouping
Subtraction involving zeros
Strategies
Standard algorithm
Breaking numbers into parts
Mental subtraction
Compensation and adjustment
Counting up to find the difference
Estimation
Checking answers using addition
Application
Multi-step word problems
Travel and distance
Money and daily-life situations
LEARNING PROGRESSION
Concrete
Objects and counters
Taking away and exchanging objects
Pictorial
Pictures and number lines
Crossing out objects
Showing differences visually
Symbolic
Number sentences
Column calculations
Flexible Thinking
Mental subtraction
Different subtraction strategies
Estimation and verification