Primary 5

Multiplying mixed numbers

Word problems where a mixed number is multiplied by a whole number. Each animation shows what the question means, then multiplies the wholes first, then the fractions, and turns extra fractions into wholes.

4 episodes 1 min in all

Play episode 1

1
0:20

Episode 1

Aishah’s father

“Twice as heavy” means 2 of Aishah. Multiply the wholes, then the quarter, and simplify.
2
0:21

Episode 2

Perimeter of three squares

Perimeter is only the outside. Walk around the shape: 8 sides, not 12. Then turn the extra tenths into wholes.
3
0:20

Episode 3

Mrs Sanjay’s saris

6 saris means 6 pieces of the same cloth. 12 fifths is too many fifths: 5 fifths make 1 whole.
4
0:21

Episode 4

Mrs Lim’s bottles of water

25 bottles of 1 1/2112 ℓ: 25 wholes and 25 halves. Every 2 halves make 1 whole.

Multiplying mixed numbers

Aishah’s father

Perimeter of three squares

Mrs Sanjay’s saris

Mrs Lim’s bottles of water