Subtraction Within 20
Exercises
Correction
Correction
| Definitions | |
|---|---|
| Subtracting Numbers Within 10 | Ex 1 Ex 2 Ex 3 Ex 4 Ex 5 Ex 6 Ex 7 |
| Subtracting by Taking Away Units | Ex 8 Ex 9 Ex 10 Ex 11 Ex 12 Ex 13 |
| Subtracting by Taking Away Units and One Ten | Ex 14 Ex 15 Ex 16 Ex 17 Ex 18 Ex 19 Ex 20 |
| Subtracting Multiple Numbers | Ex 21 Ex 22 Ex 23 Ex 24 Ex 25 Ex 26 Ex 27 |
| Breaking Down Numbers | Ex 28 Ex 29 Ex 30 Ex 31 Ex 32 Ex 33 Ex 34 |
| Number Line Method | |
| Subtracting Using the Number Line | Ex 35 Ex 36 Ex 37 Ex 38 Ex 39 Ex 40 |
| Making 10 Method | |
| Breaking Down Numbers to Make Ten | Ex 41 Ex 42 Ex 43 Ex 44 Ex 45 Ex 46 Ex 47 |
| Subtracting from Ten | Ex 48 Ex 49 Ex 50 Ex 51 Ex 52 Ex 53 Ex 54 |
| Making 10 after Breaking Down Numbers | Ex 55 Ex 56 Ex 57 Ex 58 Ex 59 Ex 60 Ex 61 Ex 62 |
| Subtracting Number Within 20 | Ex 63 Ex 64 Ex 65 Ex 66 Ex 67 Ex 68 Ex 69 Ex 70 |
| Addition and Subtraction Link | |
| Finding Subtraction Using Addition | Ex 71 Ex 72 Ex 73 Ex 74 |
| Finding the Missing Subtrahend | Ex 75 Ex 76 Ex 77 Ex 78 Ex 79 |
| Finding the Total in Subtraction Problems | Ex 80 Ex 81 Ex 82 Ex 83 Ex 84 |
| Finding the Missing Addend | Ex 85 Ex 86 Ex 87 Ex 88 Ex 89 Ex 90 Ex 91 |
| Subtracting by Thinking Addition | Ex 92 Ex 93 Ex 94 Ex 95 Ex 96 Ex 97 Ex 98 |
| Problem-Solving Methods | |
| Solving Real-World Problems | Ex 99 Ex 100 Ex 101 Ex 102 Ex 103 Ex 104 Ex 105 Ex 106 Ex 107 Ex 108 |