chalkboard not well sponged the simplest arithmetic problem mathematics adding two numbers together |
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| navigate by keyword : adding addition appearance arithmetic assimilation beginning blackboard blank board calculate calculation chalk chalkboard classroom correct creativity education equals equation good growth inside joy knowledge learn lesson lettering lifestyle luck math mental mind missing numbers operation pathway plus problem ready school score sign simplicity students sum systematics two white writing written |
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| It`s written in white chalk on a blackboard - two plus two equals four. The basics of arithmetic start with the youngest grades in every school in the world. |
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