Add within 40

$0.99/each

Add multiples of 10 within 40

1.NBT.4, 2.NBT.5

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Add 2-digit #s & 1-digit #s within 40

1.NBT.4, 2.NBT.5

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Add 2-digit numbers within 40

1.NBT.4, 2.NBT.5

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Add without crossing the 10 within 40

1.NBT.4, 2.NBT.5

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Add 2-digit #s within 40 w/o renaming

1.NBT.4, 2.NBT.5

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Add within 40

1.NBT.4, 2.NBT.5

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Add crossing the 10 within 40

1.NBT.4, 2.NBT.5

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Add 2-digit #s within 40 with renaming

1.NBT.4, 2.NBT.5

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