A teaching tool for multiplication oral formula education
A teaching tool and multiplication technology, applied in the field of education and teaching, can solve the problems of inflexibility and convenience, and achieve the effect of teaching convenience
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[0023] Such as Figure 1-4 As shown, a teaching tool for multiplication formula education includes a base 1, the upper end of the base 1 is provided with a support rod 2, and the support rod 2 is connected to the base 1 through an adjustment mechanism 3. Specifically, the adjustment mechanism 3 includes a The protrusion 20 at the lower end of the support rod 2 is engraved with external threads on the outer surface of the protrusion 20, and the upper end of the base 1 is provided with a thread groove 21, and the protrusion 20 and the thread groove 21 are threadedly connected;
[0024] The upper end of the support rod 2 is fixedly connected with a crossbar 4, and the crossbar 4 is rotatably connected with seven damping bearings 5, and the seven damping bearings 5 are respectively fixedly connected with a first turntable 6, a second turntable 7, and a third turntable from left to right. The turntable 8, the fourth turntable 9, the fifth turntable 10, the sixth turntable 11 and ...
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