105
Addition and subtraction to 999
Term 4
Write a number sentence for each.
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Explain how you counted the blocks. |
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Explain how you counted the blocks. |
Use the example to guide you.
Use near doubles to solve the following.
Use the example to guide you.
| a. 43 + 44 = | double 43 + 1 | 43 + 43 + 1 = 87 |
| b. 81 + 41 = | ||
| c. 40 + 41 = | ||
| d. 66 + 67 = |
Use doubles or near doubles
to solve the following.
Use the example to guide you.
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a. Double 340 = 340 + 340 = Double 340 = 300 + 300 + 40 + 40 = 600 + 80 = 680 |
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b. 340 + 341 = Double 340 + 1 = 300 + 300 + 40 + 40 + 1 = 600 + 80 + 1 = 681
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c. 470 + 470 = = = = |
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d. 461 + 462 = = = =
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Solve the following:
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The Grade 2s have a collection of 360 marbles. The Grade 3s have 216 fewer marbles than the Grade 2s. How many marbles do the Grade 3s have? |
