I'm stumped on how a yr 4/5 would do this (I suspect using ratios but I must admit to being stuck). Can someone work through the workings to get an answer to this (so that I can then explain it to dd and look like I worked it out myself thereby demonstrating a love of maths and much grit and determination ):
A bag of compost and a bag of sand together weigh 25kg
A bag of compost and a bag of grit together weigh 22.5kg
A bag of sand and a bag of grit together weigh 17.5kg
Find the mass in kg of:
a) a bag of compost
b) a bag of sand
c) a bag of grit
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Can someone help me with this maths question?
19 replies
MrsFogi · 02/09/2015 09:08
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steyllen ·
02/09/2015 14:01
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Egosumquisum ·
02/09/2015 20:25
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