Page 158 - NUMINO Challenge_L2

Challenge Yourself

[Sample Answer]
There are 3 snails, 4 birds, 2 butterflies, and 9 flowers.
In order to make the greatest difference, the smallest number must be
subtracted from the greatest number. 9 is the greatest number, and 2 is the
smallest number.

Subtraction expression How many more flowers are there than butterflies?
with the greatest difference

In order to make the greatest sum, the greatest number must be added to the
second greatest number. The greatest number is the number of flowers, and
the second greatest number is the number of birds.

Addition expression What is the total number of flowers and birds put together?
with the greatest sum

Guide the students so that they can find other numbers such as 45
petals, 8 butterfly wings, 8 bird legs, etc.

Connect all the pairs of dots.

3 dots 4 dots 5 dots

Count the number of lines.

Number 2 3 4 5
of dots 10

Number of 36
lines

The number of lines changes in the order of from 1, 3, 6, 10. 6 dots

1 3 6 10

+2 +3 +4 +5

When there are 6 dots, the number of lines is 10+5=15.

29Answer Key