Page 115 - NUMINO Challenge_A2

Answer
Key

4 Find the measurable masses using:

One weight: 1 g, 4 g, and 6 g
Two weights: 1 4 5 g, 1 6 7 g, and 4 6 10 g
Three weights: 1 4 6 11 g
Therefore, there are seven masses that can be measured.

Challenge Yourself

01 Parts A, B, and C are placed on the grid as shown below. All three parts are cut along

lines that are perpendicular to the sides of the square. The horizontal and vertical sides
are equal. Parts A and C have vertical and horizontal sides that are each 3 cm. Part B has
vertical and horizontal sides that are each 4 cm.

C B
A

Perimeter of A Perimeter of C 3 3 3 3 12 cm
Perimeter of B 4 4 4 4 16 cm
Therefore, the sum of the perimeters of A, B, and C 12 16 12 40 cm.

02 B 3 cm

A

C

4 cm

Length of (Length of One Side of C)
(Length of One Side of A) (Length of One Side of B)
4 3 1 cm

Length of (Length of One Side of B) (Length of One Side of C)
3 1 2 cm

Therefore, the perimeter of the colored part is 2 2 1 1 6 cm.

10 NUMINO Challenge A2