Ontario Curriculum Expectation:
3.B1.2 compare and order whole numbers up to and including 1000, in various contexts.
You can order numbers from least to greatest using a number line.
Order the numbers 150,  120, 190, and 170 from least to greatest.
1. Place all your numbers on a number line.
2. Read the numbers from left to right to get the order from least to greatest.