In this video, Teacher Mike from Kids Academy explains how to compare the lengths of objects using centimeters. The lesson covers a strategy for determining which object is longer and by how much, using subtraction. Examples include comparing nails, a paperclip and an eraser, and a marker and a pen. The video concludes with a recap of the method and encourages viewers to practice using a worksheet.

What is the first step in comparing the lengths of two objects?

• Ask someone else to measure them.

• Measure both objects.

• Estimate the length of each object.

• Guess which object is longer.

If one nail is 5 cm and another is 3 cm, how much longer is the first nail?

• 1 cm

• 2 cm

• 3 cm

• 4 cm

What should you do after measuring both objects to find the difference in length?

• Multiply the lengths.

• Add the lengths together.

• Subtract the shorter length from the longer length.

• Divide the longer length by the shorter length.

In the example with the paperclip and eraser, which object is longer?

• The paperclip

• The eraser

• They are the same length

• It cannot be determined

How much longer is the eraser compared to the paperclip?

• 1 cm

• 4 cm

• 3 cm

• 2 cm

What is the length of the marker in the example?

• 9 cm

• 8 cm

• 6 cm

• 7 cm

How much longer is the pen compared to the marker?

• 2 cm

• 5 cm

• 4 cm

• 3 cm

What is the final step in finding the difference in length between two objects?

• Multiply the lengths.

• Subtract the shorter length from the longer length.

• Divide the longer length by the shorter length.

• Add the lengths together.

What should you do if you want to find out how much bigger one object is than another?

• Measure both objects and subtract the shorter from the longer.

• Measure only the longer object.

• Guess the difference.

• Add the lengths together.

What is the key takeaway from the lesson on comparing lengths?

• Only measure one object.

• Guess the length difference.

• Use subtraction to find the difference in length.

• Always measure objects in inches.