Estimating Lengths and Measurements

In this lesson, students learn to estimate lengths in inches by using familiar objects like paper clips and crayons as references. The video demonstrates how to use a color tile ruler for estimation and provides practice with estimating the lengths of various lines. It also covers calculating lengths using repeated addition and estimating how many beads fit on a string. The lesson concludes with a preview of the next topic, measuring objects with an inch ruler.

What does it mean to estimate an answer?

• To find the smallest number

• To find a random number

• To find a good guess close to the real answer

• To find the exact answer

Which object is approximately one inch long?

• A ruler

• A new crayon

• A dollar bill

• A small paperclip

If a blue line is estimated to be four inches long, how many paperclips would fit under it?

• Five paperclips

• Four paperclips

• Three paperclips

• Two paperclips

What is the best estimate for the length of a green line if one paperclip is one inch?

• Four inches

• One inch

• Two inches

• Three inches

If a purple line is longer than a green line estimated to be three inches, what is the best estimate for the purple line?

• Three inches

• Five inches

• Eight inches

• Ten inches

Using a one-inch mark, what is the estimated length of a green line if it is four times the one-inch mark?

• Five inches

• Two inches

• Three inches

• Four inches

If a yellow line is one inch longer than a green line estimated to be four inches, what is the estimated length of the yellow line?

• Seven inches

• Six inches

• Four inches

• Five inches

How long is Dave's string if it is the length of four toy cars, each three inches long?

• Nine inches

• Ten inches

• Eleven inches

• Twelve inches

How many beads, each two inches long, will fit on a seven-inch string?

• Five beads

• Two beads

• Four beads

• Three beads

If Sarah has a seven-inch string and each bead is two inches long, how much string will be left after fitting the beads?

• Three inches

• Four inches

• Two inches

• One inch