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Addition and subtraction to 999 again
Term 4
Look at the diagrams and describe it.
Complete the following:
| a. 223 + 223 = |
| b. 160 + 160 = |
| c. 115 + 115 = |
| d. 315 + 315 = |
| e. 117 + 117 = |
| f. 450 + 450 = |
| g. 112 + = 224 |
| h. 116 + = 232 |
Write the numbers 
| a. 12 more than 523 is |
| b. 15 less than 540 is |
| c. 20 more than 576 is |
| d. 60 less than 590 is |
| e. 537 less 29 is |
| f. Half of 300 is |
| g. Double 420 is |
| h. Half of 600 is |
Add125
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What makes a 1 000?
| a. | 200 + 150 +50 + = 1 000 | e. | 25 + + 900 = 1 000 |
| b. | 1 000 = 560 + + 400 | f. | + 700 + 50 = 1 000 |
| c. | 670 + = 1 000 | g. | 1 000 = 420 + + 500 |
| d. | 910 + 40 + = 1 000 | h. | + 30 + 900 = 1 000 |
Find the + and - number families
Example: 125 + 600 = 725 725 - 125 = 600 725 -600 = 125
| 123 + 77 = | – 77 = 123 | – 123 = 77 |
| 650 + = 800 | 800 – 650 = | + 650 = 800 |
| 1 000 – 250 = | 1 000 – = 250 | 250 + = 1 000 |
| 56 + = 300 | 300 – = 56 | + 56 = |
| 820 + = 1 000 | 1 000 – = 820 | 1 000 – 820 = |
Add and take away tens and hundreds
a. Tens and hundreds
| 78 + 10 = | 149 + 10 = | 456 + 100 = | 987 + 10 = |
| 636 + 100 = | 801 + 100 = | 727 + 100 = | 612 + 10 = |
| 456 – 10 = | 749 – 100 = | 829 – 100 = | 987 – 10 = |
| 875 + 10 = | 709 – 100 = | 815 + 10 = | 903 – 100 = |
b. Whole tens (Multiples of 10)
| 150 – 30 = | 190 – 60 = | 175 – 50 = | 990 – 80 = |
| 210 + 90 = | 335 + 60 = | 660 + 50 = | 812 + 60 = |
| 256 – 50 = | 320 – 30 = | 785 – 60 = | 999 – 90 = |
| 567 + 37 = | 671 + 90 = | 832 + 80 = | 928 + 80 = |
Solve the following:
925 + 53 = 571 + 202 = 786 + 75 = 903 + 95 =
