怎樣提高小學(xué)生數(shù)學(xué)計算能力之五(編輯修改稿)
2024-11-04 06:26 本頁面
【文章內(nèi)容簡介】 提高學(xué)生的計算能力。(1)using 35 minutes daily oral the teaching, I every day in the classroom use of 35 minutes oral training, or ShiSuan or listen to calculate, or, in the case of a homework to copy one or two off type calculation problem, marking and feedback in time every day, gradually improve the students39。 ability of calculation.（2）記憶一些常用數(shù)據(jù)和巧算方法。像20以內(nèi)的加減法、表內(nèi)乘法、120的平方數(shù)等，都要求學(xué)生熟記，達到脫口而出的程度。同時，經(jīng)常教學(xué)生一些巧算的方法，也可使其計算速度大大提高。如：一個數(shù)與“11”相乘，“兩邊一拉，中間一加，滿十向前一位進一”；一個數(shù)與2125相乘，都可以運用巧算方法：(2)memory and some monly used data coincidence counting addition and subtraction, multiplication table within 20, 120 square number, etc., require students to memorize and to the point of blurt the same time, often teach students some clever calculate way, also can make its calculation speed is greatly as: is multiplied by a number from “11”, “on both sides of a pull, a middle, ten a into a” forward。With a number is multiplied by 5, 25, 125, can use opportunely calculate method:245=24247。210* 24 present 2 * 5 = 1032425=324247。4100= 324 present 4 x 324 x 324409125=408125+125=408247。81000+125409 * 125 = 408 * 125 + 125 = 408 present 8 x 1000 + 125還有一些除法試商法：差數(shù)試商法、同頭無除商八九法（當被除數(shù)和除數(shù)最高位上的數(shù)字相同時，俗稱“同頭”，被除數(shù)的前幾位比除數(shù)小，且除數(shù)與被除數(shù)次高位上的數(shù)的差不超過最高位時，可直接用八與九試商）、中數(shù)試商法、折半試商法等等，這些都是學(xué)生快算所必須掌握的基本方法。Try some division mercial law: differential try to mercial law, with the head in addition to business method(when the Numbers on the dividend and the divisor that high phase at the same time, monly known as the “head”, dividend top is smaller than the divisor, and the divisor and dividend the number of times on the high error is less than the highest level, can be directly used eight and nine test quotient), median try mercial law, binary and mercial law, and so on, these are students quick is necessary to master the basic 、理解算理，提倡算法多樣化要使學(xué)生會算，必須要使其明確算理，這就要求教師對算法和算理的教學(xué)必須正確，因為第一印象非常重要，第一次講錯以后就很難改掉。記得一位心理學(xué)家說過：首次感知新知識時，進入大腦的信息可以有受前攝抑制的干擾，能在學(xué)生的大腦皮層留下深刻的印象。但如果首次感知不準確，那么造成的不良后果在短期內(nèi)是難以清除的。因此，教師必須充分備課，選擇最優(yōu)方案，以期達到良好的教學(xué)效果。To make the student union, must make it clear to calculate, this requires teachers to the algorithm and the principle of teaching must be correct, because the first impression is very important, for the first time speak wrong, it is hard to remove it a psychologist said: first perception of new knowledge, proactive inhibition of information into the brain can be affected by the interference, can leave deep impression in students39。 brain if the first perception is not accurate, the adverse consequences in the short term is difficult to , the teacher must fully preparation, select the optimal scheme, in order to achieve good teaching ，要提倡算法多樣化。算法多樣化不是要求每個學(xué)生都用多種方法解決同一問題，而是要鼓勵學(xué)生獨立思考，用適合自己的方法解決，有能力的可以運用多種方法，沒有這種需求的學(xué)生只用一種即可。提倡算法多樣化，也要注意方法的優(yōu)化，對于學(xué)生想出的每一種正確方法都給予肯定，說服學(xué)生放棄自己的落后繁瑣觀點，去遵循優(yōu)秀、簡潔的方法，這樣才能使自己的思維能力不斷提高。特別要對中、高年級提出的每一種算法，可讓其自己說明算理，以防止其“知其然，不知其所以然”，同時起到培養(yǎng)學(xué)生邏輯思維和口頭表達能力的作用。In students is clear, on the basis of to promote diversity algorithm isn39。t required that every student(should)use a variety of methods to solve the same problem, but rather to encourage students to think independently and solve with suitable methods, ability can use a variety of methods, without the need of students in a algorithm diversity, also want to pay attention to the optimization method, for students to e up with every kind of right way to give affirmation, persuade students give up their backward trival, to follow the outstanding, simple me
職業(yè)教育相關(guān)推薦
鄂ICP備17016276號-1