This video tutorial covers lesson 9.7 on measuring and comparing lengths in centimeters. It explains how to measure objects using a ruler, compare their lengths, and solve word problems involving subtraction and addition. The tutorial also highlights the importance of estimation and provides examples of measuring different objects. The lesson concludes with a preview of the next chapter on data and information.

What is the first step in measuring an object using a ruler?

• Align the top of the object with the zero mark

• Align the center of the object with the zero mark

• Align the left side of the object with the zero mark

• Align the right side of the object with the zero mark

If a paintbrush measures 18 cm and a pencil measures 12 cm, what is the difference in their lengths?

• 7 cm

• 4 cm

• 5 cm

• 6 cm

How do you find the difference between the lengths of two objects?

• Subtract the length of the shorter object from the longer object

• Divide the length of the longer object by the shorter object

• Multiply the lengths of both objects

• Add the lengths of both objects

What is the length of the green line if it measures 16 cm and the yellow line measures 13 cm?

• 2 cm

• 3 cm

• 5 cm

• 4 cm

If an orange line measures 11 cm and a blue line measures 14 cm, how much longer is the blue line?

• 2 cm

• 3 cm

• 4 cm

• 5 cm

What is the difference in length between a green line measuring 9 cm and an orange line measuring 6 cm?

• 5 cm

• 4 cm

• 3 cm

• 2 cm

If a purple line measures 22 cm and an orange line measures 6 cm, what is the difference in their lengths?

• 14 cm

• 15 cm

• 16 cm

• 17 cm

Sophia has a ribbon that is 25 cm long and cuts off 9 cm. What is the new length of the ribbon?

• 15 cm

• 14 cm

• 17 cm

• 16 cm

Sarah's necklace is 6 cm longer than her bracelet, which is 18 cm long. How long is her necklace?

• 22 cm

• 24 cm

• 25 cm

• 23 cm

What operation would you use to find the length of an object after part of it is cut off?

• Multiplication

• Division

• Subtraction

• Addition