Yeo Kenny's answer to Lim jia an's Primary 5 Maths Decimals Singapore question.
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a)
1 carton can contain 250 cans
2 cartons can contain 2*250 =500
3 cartons can contain 3*250 =750
4 cartons can contain 4*250 = 1000
5 cartons can contain 5*250 = 1250
6 cartons can contain 6*250 =1500
so just need 6 cartons to pack 1425 cans
b) zero cans left after using 6 cartons
1 carton can contain 250 cans
2 cartons can contain 2*250 =500
3 cartons can contain 3*250 =750
4 cartons can contain 4*250 = 1000
5 cartons can contain 5*250 = 1250
6 cartons can contain 6*250 =1500
so just need 6 cartons to pack 1425 cans
b) zero cans left after using 6 cartons
Date Posted:
1 year ago
I din’t understand i need another methou
okay 1 carton can pack 250 cans right?
Ya
how about 2 cartons.. how many can I pack?
500
Good! how about 6 cartons? how many can you pack?
I think the fact that they wanted “how many cans were left unpacked” suggests that the earlier cartons must be complete ones.
For this question, we have 5 cartons with 175 cans left over.
Maybe the question could have been better indicated at the start as “the cans are packed into several complete cartons, with some cans being left over”.
For this question, we have 5 cartons with 175 cans left over.
Maybe the question could have been better indicated at the start as “the cans are packed into several complete cartons, with some cans being left over”.
Normally otherwise they would ask “what is the minimum number of cartons required to pack all the cans”.
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