Practice Number Sense in Math
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
An intuitive understanding of numbers, their relative size, and how they relate to each other and to real quantities.
Knowing that 100 is way more than 10, or that 7 is between 5 and 10.
Example 1
easyWithout calculating exactly, determine which is greater: 3 \times 99 or 4 \times 74.
Example 2
mediumA school has 483 students. Each classroom holds about 30 students. Approximately how many classrooms are needed?
Example 3
easyPlace the following numbers on a mental number line from smallest to largest: 0.5, 5, 50, 0.05.
Example 4
mediumWithout a calculator, is \frac{7}{8} closer to \frac{1}{2} or to 1? Explain.