Indra's answer to Nurul's Primary 6 Maths Measurement Singapore question.
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a) So the first step is to find C, knowing the values of A and B
A=B - (2y + 3)
B=C + (y - 1)
14y + 26 - (2y + 3) =C + (y-1) + C
14y + 26 - 2y - 3 = C + y - 1 + C
12y + 23 = 2C + y -1
11y + 24 = 2C
C=(11y + 24) ÷ 2
C=11y/2 + 12 OR 5.5y + 12
B=5.5y + 12 + (y - 1)
B=6.5y + 11
b) Sub Y=40 into B since it is the longest string(if you read the statement carefully)
B=6.5y + 11
B=6.5(40) + 11
B=271cm
A=B - (2y + 3)
B=C + (y - 1)
14y + 26 - (2y + 3) =C + (y-1) + C
14y + 26 - 2y - 3 = C + y - 1 + C
12y + 23 = 2C + y -1
11y + 24 = 2C
C=(11y + 24) ÷ 2
C=11y/2 + 12 OR 5.5y + 12
B=5.5y + 12 + (y - 1)
B=6.5y + 11
b) Sub Y=40 into B since it is the longest string(if you read the statement carefully)
B=6.5y + 11
B=6.5(40) + 11
B=271cm
Date Posted:
3 years ago
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