Page 51 - NUMINO TG_2A
P. 51
03Unit Animal Race
jOb ective Find the longest and the shortest lengths.
1. Textbook Instructions Unit
Stimulate students’ interest about what they 03 Animal Race
are going to learn in the unit with the following
discussion. Animals are having a race. There are 3 paths. Each animal has
What animals can you see? A sheep, rat, to choose a separate path. If all the animals run at the same
and monkey. speed, in what order will the animals arrive at the finish line?
What are they doing? They are having a race.
Which animal would arrive first if they ran
at the same speed? The monkey.
Which animal would arrive last? The sheep.
List the animals in the order of their arrival
from first to last. Monkey, rat, and sheep.
How can you find the shortest path? Finishing order: monkey rat sheep
Discuss with your classmates.
A1: Just by looking at it, the monkey’s path Chat
How can you find the shortest path? Discuss with your classmates.
looks like the shortest, and the sheep’s
path looks like the longest. The shortest path can be found by comparing the number of unit lengths and
A2: The sheep travels 6 units, while the rat diagonals in each path.
travels 5, so the rat finishes first.
A3: The monkey cuts across what the rat
went around in 2 units, so the monkey
can finish faster.
Ask the students if there is a more precise
method for determining the lengths of the
3 paths.
20
2. Build Understanding
How can you determine the longest and the shortest paths?
There are squares with equal sides . First, cancel out the same parts in the 3 respective paths.
Then compare the 3 remaining paths to find the order of their arrivals.
034 NUMINO Teacher s Guide
jOb ective Find the longest and the shortest lengths.
1. Textbook Instructions Unit
Stimulate students’ interest about what they 03 Animal Race
are going to learn in the unit with the following
discussion. Animals are having a race. There are 3 paths. Each animal has
What animals can you see? A sheep, rat, to choose a separate path. If all the animals run at the same
and monkey. speed, in what order will the animals arrive at the finish line?
What are they doing? They are having a race.
Which animal would arrive first if they ran
at the same speed? The monkey.
Which animal would arrive last? The sheep.
List the animals in the order of their arrival
from first to last. Monkey, rat, and sheep.
How can you find the shortest path? Finishing order: monkey rat sheep
Discuss with your classmates.
A1: Just by looking at it, the monkey’s path Chat
How can you find the shortest path? Discuss with your classmates.
looks like the shortest, and the sheep’s
path looks like the longest. The shortest path can be found by comparing the number of unit lengths and
A2: The sheep travels 6 units, while the rat diagonals in each path.
travels 5, so the rat finishes first.
A3: The monkey cuts across what the rat
went around in 2 units, so the monkey
can finish faster.
Ask the students if there is a more precise
method for determining the lengths of the
3 paths.
20
2. Build Understanding
How can you determine the longest and the shortest paths?
There are squares with equal sides . First, cancel out the same parts in the 3 respective paths.
Then compare the 3 remaining paths to find the order of their arrivals.
034 NUMINO Teacher s Guide
