Math 1A Singapore-Measuring Length-Chapter 8.2

Measuring Length

Know about Measuring Length:

John uses ice cream sticks to measure the length of a table. Each ice-cream stick stands for 1 unit.

The length of the table is about 12 (twelve) units.

1. Mary uses paper-clips (as a unit) to measure the length of a book.

The length of the book is about ___ units.

Answer:

The length of the book is about 5 units.

[Note: Count paper-clips on the book.]

2. Make a chain of 20 paper clips.

Chain of 20 paper clips:

(a) The length of the chain is _____ units.

(b) Use the chain (single paper-clip as a unit) to measure your hand and your foot.

My hand is about ___ units long.

My foot is about ___ units long.

(c) Which is longer, your hand or your foot (measure as a unit of paper-clip)?

Solution:

[Each Paper clip stands for 1 unit]

(a) The length of the chain is 20 units.

(b) My hand is about 5 units long. My foot is about 6 units long.

(c) My foot is longer than my hand.

Workbook exercise 58(3)

Color the tape which is 8 units long (Red marked single side as 1 unit).

[Marked red square wide = 1 units]

Solution:

Workbook exercise 58(4)

								B
A
				C

(a) Tape A is _____ units long.

(b) Tape B is _____ units long.

(c) Tape C is _____ units long.

Solution:

(a) Tape A is 7 units long.

(b) Tape B is 5 units long.

(c) Tape C is 3 units long.