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Subtraction Within 1000

Learning tasks
        
Lesson Summary
Text book
Exercises Correction
A) What is Subtraction?
    1) Subtracting Numbers Within 20Ex 1 Ex 2 Ex 3 Ex 4 Ex 5 Ex 6 Ex 7 Ex 8
    2) Subtracting Multiple NumbersEx 9 Ex 10 Ex 11 Ex 12 Ex 13 Ex 14 Ex 15
B) An Alternative Strategy: Compensation
    3) Subtracting Using Columns to 100 With CompensationEx 16 Ex 17 Ex 18 Ex 19 Ex 20 Ex 21
    4) Subtracting Using Columns to 1 000 Without CompensationEx 22 Ex 23 Ex 24 Ex 25 Ex 26 Ex 27
    5) Subtracting Using Columns to 1 000 With CompensationEx 28 Ex 29 Ex 30 Ex 31 Ex 32
    6) Subtracting Using Columns to 1 000 With CompensationEx 33 Ex 34 Ex 35 Ex 36 Ex 37
    7) Solving Real-World ProblemsEx 38 Ex 39 Ex 40 Ex 41