If 18 oatcakes requires 140g, then 9 would require half of this
b) 90 oatcakes
Need to think of factors. This is the trick to all of these styles of questions. So 80 ml makes 18 oatcakes. Therefore, if she only has 400 ml, then its how many “lots of” 80 do you get into 400. This would be 5 lots. So 5 lots of 18 oatcakes=90
c) See below:
Again, think of factors. Starting point is 18 and this question asks for 27. Therefore HCF of 18 & 27 is 9. If 18 requires X Ingredients, what does 9 require? This is your starting point. 9 requires half of what 18 requires. Therefore, 27 requires 3 times what 9 requires
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16. A twelve inch ruler is approximately 30 cm long. Use this fact to estimate each of the following:
i) The number of centimetres in 4 inches.
ii) The number of inches in 5 centimetres.
iii)The number of centimetres in 9 feet 10 inches