Using the Ruler: Measuring to the Nearest ½ Inch 1 Using the Ruler: Measuring to the Nearest ½ Inch

Each inch is divided into 16 parts. 2 1 Each inch is divided into 16 parts. In 4th grade, we learn to measure to the nearest half inch.

1 4 3 4 1 2 1 We use the 1/4 inch marks to help us measure to the nearest ½ inch.

1 4 3 4 1 2 1 If a line comes BEFORE the 1/4 inch mark, we round DOWN to the ½ inch mark.

1 4 3 4 1 2 1 If a line comes AFTER the 1/4 inch mark, we round UP to the next ½ inch.

? 1 2 ? Measure the line to the nearest ½ inch. 1 ½ inches

? 9 10 ? Measure the line to the nearest ½ inch. 10 inches

? 23 24 ? Measure the line to the nearest ½ inch. 23 inches

? 99 100 ? Measure the line to the nearest ½ inch. 99 ½ inches

? 19 20 ? Measure the line to the nearest ½ inch. 20 inches

? 43 44 ? Measure the line to the nearest ½ inch. 43 ½ inches

? 3 4 ? Measure the line to the nearest ½ inch. 3 ½ inches

? 26 27 ? Measure the line to the nearest ½ inch. 26 ½ inches

? 17 18 ? Measure the line to the nearest ½ inch. 17 ½ inches

? 86 87 ? Measure the line to the nearest ½ inch. 87 inches

As you measure to the nearest ½ inch, Awesome job! Remember: As you measure to the nearest ½ inch, use the ¼ marks to help you round. They’re just like the “5”.