Subtraction Within 100

Learning tasks

A) What is Subtraction?
1) Subtracting Within 20	Ex 1 Ex 2 Ex 3 Ex 4 Ex 5 Ex 6 Ex 7 Ex 8
2) Subtracting Multiple Numbers	Ex 9 Ex 10 Ex 11 Ex 12 Ex 13 Ex 14 Ex 15
B) Subtracting Ones Then Tens
3) Subtracting Within 100 Without Regrouping in Table	Ex 16 Ex 17 Ex 18 Ex 19 Ex 20
4) Subtracting Within 100 Without Regrouping	Ex 21 Ex 22 Ex 23 Ex 24 Ex 25
5) Subtracting Within 100 With Regrouping in Table	Ex 26 Ex 27 Ex 28 Ex 29 Ex 30
6) Subtracting Within 100 With Regrouping	Ex 31 Ex 32 Ex 33 Ex 34
C) Subtraction in Columns
7) Subtracting Using Columns to 100 Without Regrouping	Ex 35 Ex 36 Ex 37 Ex 38 Ex 39
8) Subtracting Using Columns to 100 With Regrouping	Ex 40 Ex 41 Ex 42 Ex 43 Ex 44
9) Solving Real-World Problems	Ex 45 Ex 46 Ex 47 Ex 48

Lesson Summary
Text book

Exercises Correction
A) What is Subtraction?
    1) Subtracting Within 20 Ex 1 Ex 2 Ex 3 Ex 4 Ex 5 Ex 6 Ex 7 Ex 8
    2) Subtracting Multiple Numbers Ex 9 Ex 10 Ex 11 Ex 12 Ex 13 Ex 14 Ex 15
B) Subtracting Ones Then Tens
    3) Subtracting Within 100 Without Regrouping in Table Ex 16 Ex 17 Ex 18 Ex 19 Ex 20
    4) Subtracting Within 100 Without Regrouping Ex 21 Ex 22 Ex 23 Ex 24 Ex 25
    5) Subtracting Within 100 With Regrouping in Table Ex 26 Ex 27 Ex 28 Ex 29 Ex 30
    6) Subtracting Within 100 With Regrouping Ex 31 Ex 32 Ex 33 Ex 34
C) Subtraction in Columns
    7) Subtracting Using Columns to 100 Without Regrouping Ex 35 Ex 36 Ex 37 Ex 38 Ex 39
    8) Subtracting Using Columns to 100 With Regrouping Ex 40 Ex 41 Ex 42 Ex 43 Ex 44
    9) Solving Real-World Problems Ex 45 Ex 46 Ex 47 Ex 48