Subtraction Within 20
Exercises
Correction
Correction
| A) What is Subtraction? | |
|---|---|
| 1) Subtracting Numbers Within 10 | Ex 1 Ex 2 Ex 3 Ex 4 Ex 5 Ex 6 Ex 7 |
| 2) Subtracting by Taking Away Units | Ex 8 Ex 9 Ex 10 Ex 11 Ex 12 Ex 13 |
| 3) Subtracting by Taking Away Units and One Ten | Ex 14 Ex 15 Ex 16 Ex 17 Ex 18 Ex 19 Ex 20 |
| 4) Subtracting Multiple Numbers | Ex 21 Ex 22 Ex 23 Ex 24 Ex 25 Ex 26 Ex 27 |
| 5) Breaking Down Numbers | Ex 28 Ex 29 Ex 30 Ex 31 Ex 32 Ex 33 Ex 34 |
| B) Subtracting on the Number Line | |
| 6) Subtracting Using the Number Line | Ex 35 Ex 36 Ex 37 Ex 38 Ex 39 Ex 40 |
| C) The "Subtract to Make 10" Strategy | |
| 7) Breaking Down Numbers to Make Ten | Ex 41 Ex 42 Ex 43 Ex 44 Ex 45 Ex 46 Ex 47 |
| 8) Subtracting from Ten | Ex 48 Ex 49 Ex 50 Ex 51 Ex 52 Ex 53 Ex 54 |
| 9) Making 10 after Breaking Down Numbers | Ex 55 Ex 56 Ex 57 Ex 58 Ex 59 Ex 60 Ex 61 Ex 62 |
| 10) Subtracting Number Within 20 | Ex 63 Ex 64 Ex 65 Ex 66 Ex 67 Ex 68 Ex 69 Ex 70 |