A few weeks ago my girls were playing in the driveway with sidewalk chalk and I thought it would be fun to make a giant number line.
几个星期前我的女儿们在自家车道上用粉笔玩耍，这让我想到在地上画出一排巨大的数字也许会非常有趣。
Diagram 5 shows an incomplete number line.
图5显示一条不完整的数目线。
The integers divide the number line into infinitely many half-open intervals.
整数把数轴分成无穷多个半开区间。
For example a teacher might use a number line to help a child understand the difference between larger and smaller Numbers.
举个例子，老师用一条数字线来帮助孩子理解大数和小数的区别。
In solving rational inequalities, using the number line yields a higher correctness rate than using algebraic manipulations.
解答分式不等式，选用数轴标根法比代数方法有更高的正确率。
In solving rational inequalities, using the number line yields a higher correctness rate than using algebraic manipulations.
解答分式不等式，选用数轴标根法比代数方法有更高的正确率。
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