simple math equation with subtraction number |
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navigate by keyword : equation minus mathematics subtraction math number equals formula vertical colorful education simple cards teach school child age early symbol concept learn arithmetic lesson blackboard sign elementary algebra homework student teacher addition study game count sum primary kindergarten knowledge two science calculation photography theory preschool play puzzle kids lecture chalkboard childhood |
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Simple math equation with subtraction of number. Six minus four equals two. Vertical photo of color cards with numbers for teaching child mathematics from early age |
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