Page 64 - SK Year 5 Mathematics DLP

8 Aubrey has 85 pieces of photos. She
arranges 4 pieces of photos on each
page of her album. The album contains
15 pages. Will there be 25 remaining
number of photos that cannot be
arranged in the album? Prove it.

Solution

85 pieces of photos.
4 pieces of photos on each page.
The album has 15 pages.

Will there be 25 remaining number of photos that cannot be arranged?

85
pieces of
photos 4 pieces of photos on
each page

remaining
?
photo

85 – 15 × 4 =
85 – 15 × 4 = 85 – 60 15 × 4 + 25 = 60 + 25
= 25 = 85

85 – 15 × 4 = 25

Yes, the remaining number of photos that
cannot be arranged in the album is 25.

The remaining photos are arranged in a similar
album. How many pages are still empty?

56
1.9.2