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有些家长和教师问我:“现在学生计算很容易出错,你有什么好办法?”我会说:“加强口算和估算”。这是我二十多年来的教学的总结。因为在教学过程中我发现学生错计算,通常不是法则错误,而是口算时错。例如9×4=32、24×5=100、7+8=13,这些错误一发生,学生的四则计算都会出错,因为除法是乘法的逆运算,减法是加法的逆运算。因此,要提高学生的计算能力,首先要提高口算能力。
Some parents and teachers ask me: “Now the student calculation is very easy to make mistakes, what is a good way for you? ” “I would say: ” Strengthen the calculation and estimation ". This is my 20 years of teaching summary. Because in the teaching process I found that students miscalculated, usually not the law of error, but the wrong word. For example, 9 × 4 = 32, 24 × 5 = 100, 7 + 8 = 13, these errors occur, the student’s four calculations will be wrong, because the division is the inverse of multiplication, subtraction is the addition of the inverse operation. Therefore, to improve students’ computing ability, we must first improve the ability to speak.