The Sum Stock Videos

Browse 68,069 authentic the sum stock videos, stock footage and video clips available in a variety of formats and sizes to fit your needs, or explore the sum icon or the sum of stock videos to discover the perfect clip for your project.

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focusing on paper which concentrated elementary school kid calculating and writing while learning how to calculate number addition lesson in mathematics class at school. asian student wearing eyeglasses doing homework of number addition on paper. - the sum stock videos & royalty-free footage
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Focusing on paper which concentrated elementary school kid calculating and writing while learning how to calculate number addition lesson in mathematics class at school. Asian student wearing eyeglasses doing homework of number addition on paper.
Mathematics, Child
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electrons at work - part 20 of 22. electrons carry electric charges; they have mass and can move objects by colliding with them. visual evidence that electrons can be found in all kinds of materials is given when a hairbrush rubbed on a cat attracts a ban - the sum stock videos & royalty-free footage
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Electrons at Work - part 20 of 22. Electrons carry electric charges; they have mass and can move objects by colliding with them. Visual evidence that electrons can be found in all kinds of materials is given when a hairbrush rubbed on a cat attracts a ban
Computer, 1960-1969, Archival
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