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| 30 30 playsLearn how to subtract. -
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| 56 56 playsLearn about composing and decomposing, part 2. -
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| 54 54 playsExplore how to find a missing addend. -
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| 27 27 playsLearn how to add. -
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| 31 31 playsExplore how to find a missing addend, part 2. -
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| 58 58 playsLearn how to solve addition story problems. -
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| 49 49 playsLearn about composing and decomposing. -
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| 37 37 playsLearn how to solve subtraction story problems. -
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| 62 62 playsIntroduction composing and decomposing. -
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| 101 101 playsExplore how to make the number 10. -
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| 43 43 playsLearn about comparing numbers and groups using greater than, less than and equal to. -
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| 138 138 playsExplore subitizing. -
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| 73 73 playsExplore subitizing, part 2. -
From [email protected]
| 58 58 playsLearn about comparing numbers and groups using greater than, less than and equal to, part 2. -
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| 65 65 playsExplore subitizing by grouping quantities. -
From [email protected]
| 76 76 playsLearn about the counting principle number cardinality.