Grades 3-4 Video Solutions 2023-2023_3-4

Video Transcription

Video Summary

In the problem, Andrew needs to determine which of his 60 cm rulers, marked at certain intervals, can still measure lengths of 10, 20, 30, 40, 50, and 60 cm despite faded markings. Each option involves using subtraction to calculate missing measurements. After evaluating each given ruler, only ruler E allows for all required measurements: 10 cm (straight to the 10 mark), 20 cm (60 - 40), 30 cm (40 - 10), 40 cm (straight to the 40 mark), 50 cm (60 - 10), and 60 cm (full length). Thus, ruler E is the correct choice for Andrew.