Question

Brandon used 1 2

3 kg of plant food on his strawberry plants and used 1
4
kg for his tomato plants.
He wants to feed his strawberry plants 2 more times and his tomato plants one more time.
How much plant food will he need?

Answer 1

`5(1)/(2)\ \text{kg}`

Explanation:

Plant food used on strawberry plants is

`1(2)/(3)\ \text{kg}=(5)/(3)\ \text{kg}`

Plant food used on tomato plants is

`(1)/(4)\ \text{kg}`

Feeding the strawberry plants two times means

`(5)/(3)+2*(5)/(3)=(5)/(3)+(10)/(3)\\ =(15)/(3)=5\ \text{kg}`

Feeding the tomato plants one more time means

`(1)/(4)+(1)/(4)=(2)/(4)\\ =(1)/(2)\ \text{kg}`

The plant food he will need is
`5+(1)/(2)=5(1)/(2)\ \text{kg}`