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Activity 2 Measuring with Unit Lengths

jOb ective Measure length using unit lengths.

1. Textbook Instructions Activity 2 Measuring with Unit Lengths

Explain the “unit lengths” that are used to 1 Measure the objects by using unit lengths.
measure the lengths of objects.
A unit length is the basic length unit length
1a. Have students understand that unit used to measure objects. 2 unit lengths
lengths can be used to measure, compare, The length of a pencil, your hand, 3 unit lengths
and talk about lengths. and many other objects can be
How many times longer is the colored used as a unit length.
pencil than the pencil? 3 times.
What about the baguette length with a Write the appropriate numbers in the blanks.
reference to the pencil? 5 times longer.
The basic length used to measure objects unit length
is called a unit length. What are some
good things about using unit lengths? It is 3 unit lengths
easier to compare lengths because they can
be expressed in numbers. 5 unit lengths
If you have more number of unit lengths, then
you know that the length of an object is b Color the number of unit lengths written.
greater.
unit length
Instruct students to use the word “about” to
talk about lengths that do not add up to 2 unit lengths
exact units. 5 unit lengths

c How many unit lengths are there in each object?

8 unit lengths 4 unit lengths

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2. Build Understanding

Divisible and Indivisible Quantities
Objects that are countable, such as fruits or animals, are called divisible quantities. Objects that are not
countable, such as the length of a stick or the amount of water, are called indivisible quantities.

Examples of divisible quantities Examples of indivisible quantities

one apple, two apples, one chick, two chicks,

three apples three chicks, four chicks length of a stick amount of water

038 NUMINO Teacher s Guide
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