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口算是笔算的基础.经验证明,凡是口算能力强的学生,不仅笔算能够做到正确迅速,而且对应用题的解答也能做到方法合理,灵活多样.由于口算不需借助计算工具,能直接通过思维算出结
Mouth count is the basis for pen calculations.Experience has shown that those who have a strong ability to calculate the ability to not only can be done correctly and quickly, but also the answers to the questions can be done reasonably and flexibly.As the mouth count without the aid of computational tools, can direct Calculate the knot by thinking