Addition using the "arrow way"

主題：加法

Enter two 2-digit numbers. Starting with the first number, add "chunks" of the second number until you've added the entire second addend. (Unfortunately, you are limited to a maximum of four steps.)

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ITA - Angles at the centre and circumference n.3
square #3
CECEWEKSTEIN_ ray construction
Isabel #7.33 P.2.3
Congruency of triangles

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Dilation
數學
Linear Equations
百分率
積分

Addition using the "arrow way"

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