We needed to do decimals to round up and round down numbers.我们得把小数四舍五入成整数。...simple math concepts, such as decimals and fractions.简单的数学概念，如小数和分数We needed to do decimals to round up and round down numbers...我们得把小数四舍五入成整数。...
We needed to do decimals to round up and round down numbers.我们得把小数四舍五入成整数。The students had a grasp of decimals, percentages and fractions.学生们掌握了小数、百分数和分数。T: Who can divide the repeating decimals into two groups? Why?师: 谁...