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1960s: Close up, pencil writing equation on paper. Writing on paper. Pencil writes equation.
1960s: Close up, equations written on paper, pencil points to numbers.
1960s: Close up, pencil writing equation on paper. Writing on paper.
1950s: Hand with pencil solves multiplication problem on paper.
1960s: Man looks at gauges. Scope Motor Tester in operation.
1960s: Student picks up weights, then sets them on surface. Student attaches scale to stand and hooks weight to the scale.
1960s: Boy at a desk listens. Two open paint cans turn into measure glasses with paint. One has ⅓ and the other ½. One now has 56 and other empty. Problem "½ + ⅓" Boy writes 56. Boy listens.

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1089878033
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1960er: Etiketten mit Gleichungen auf ihnen.

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