奥数速算与巧算一、6.25X1.25X6.4二、0.1+0.3+···+0.9+0.11+0.13+0.15+···+0.97+0.99三、199.9X19.98-199.8X19.97四、23.75X3.987+6.013X92.07+6.832X39.87五、(1+0.12+0.23)X(0.12+0.23+0.34)-(1+0.12+0.23+0.34)X(0.12+0.23)
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/10 15:45:14
![奥数速算与巧算一、6.25X1.25X6.4二、0.1+0.3+···+0.9+0.11+0.13+0.15+···+0.97+0.99三、199.9X19.98-199.8X19.97四、23.75X3.987+6.013X92.07+6.832X39.87五、(1+0.12+0.23)X(0.12+0.23+0.34)-(1+0.12+0.23+0.34)X(0.12+0.23)](/uploads/image/z/810981-45-1.jpg?t=%E5%A5%A5%E6%95%B0%E9%80%9F%E7%AE%97%E4%B8%8E%E5%B7%A7%E7%AE%97%E4%B8%80%E3%80%816.25X1.25X6.4%E4%BA%8C%E3%80%810.1%2B0.3%2B%C2%B7%C2%B7%C2%B7%2B0.9%2B0.11%2B0.13%2B0.15%2B%C2%B7%C2%B7%C2%B7%2B0.97%2B0.99%E4%B8%89%E3%80%81199.9X19.98-199.8X19.97%E5%9B%9B%E3%80%8123.75X3.987%2B6.013X92.07%2B6.832X39.87%E4%BA%94%E3%80%81%EF%BC%881%2B0.12%2B0.23%EF%BC%89X%EF%BC%880.12%2B0.23%2B0.34%EF%BC%89-%EF%BC%881%2B0.12%2B0.23%2B0.34%EF%BC%89X%EF%BC%880.12%2B0.23%EF%BC%89)
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