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四年级儿童对加1到加9和减1到减9,已有熟练的口算和笔算能力,“教珠算口诀时应当联系口算的方法,结合拨珠的动作,使儿童了解口诀的来源和口诀中各个字的含意。”我在教珠算加减法时,有如下一些体会:首先要使儿童理解口诀中每一个数的排列次序以及上、下、去、进、退、还等字眼的意义和作用;然后通过口算、拨珠,从算盘上数的变化来编写口诀。使儿童明
Fourth grade children plus 1 plus 9 and minus 1 to minus 9, has a skilled oral and pen skills, “teach abacus tactics should be linked to the mouth count method, combined with the action beads, so that children understand the source of formulas and formulas In the word meanings. ”I teach abacus addition and subtraction, the following experience: First of all to make children understand the order of each number in formulas and the meaning of upper, lower, go, forward, back, and other words And the role; and then through the mouth count, dial beads, counting from the abacus changes to write formulas. Make children clear