A recipe for ten flapjacks needs 20g butter, 30g sugar and 50g rolled oats. How many flapjacks can
I make if I have 140g butter, 150g sugar and 200g
rolled oats?

49

Step-by-step explanation:

For 10 flapjacks we need a total of 100g of ingredients

therefore, we need to get how many gram for 1 flapjacks

that is, for butter 20÷10=2

for sugar 30÷10=3

for rolled oats 50÷10=5

that's a total of 10.

this means it takes 10g of ingredients to make 1 flapjacks

then 140+150+200=490

490÷10=49

The final answer is 49 flapjacks can be made from the above ingredients

assuming you mean addition: addition and subtraction are reverse operations.

step-by-step explanation:

is only a line? i think so