Question

Please help this is for my son

Answer 1

Total cookies both baked

$\\ \tt\longmapsto \dfrac{1}{3}+\dfrac{2}{5}$

$\\ \tt\longmapsto \dfrac{5+6}{15}=\dfrac{11}{15}$

Cookies left:-

$\\ \tt\longmapsto 30-11/15(30)=30-22=8$

Answer 2

Answer:

8 cookies left to be baked

Step-by-step explanation:

Len

Len bakes 1/3 of 30 cookies

To find 1/3 of 30, divide 30 by 3 then multiply by 1:

$\implies \frac{30}{3} \times1=10 \times 1=10$

Therefore, Len bakes 10 cookies

Sallesh

Sallesh bakes 2/5 of 30 cookies

To find 2/5 of 30, divide 30 by 5 then multiply by 2:

$\implies \frac{30}{5} \times2=6 \times 2=12$

Therefore, Sallesh  bakes 12 cookies

Cookies left to bake

To calculate how many cookies are left to bake, subtract the found number of cookies Len and Sallesh have baked from 30:

30 - 10 - 12 = 8

So there are 8 cookies left to be baked.