Raymond's answer to Emily's Primary 6 Maths Measurement Singapore question.
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TV: FRIDGE + WASHER
11 UNITS :20 UNITS
TOTAL UNITS -> 31
FRIDGE = TV + WASHER
1 UNIT :4 UNITS
TOTAL UNITS -> 5
SINCE BOTH CASE, NUMBER OF TOTAL NUMBER OF UNITS SHOULD BE THE SAME,
LOWEST COMMON MULTIPLE:
31 × 5 = 155 UNITS
TV -> 11/31 x 155 UNITS = 55 UNITS
FRIDGE -> 1/5 x 155 UNITS = 31 UNITS
WASHER -> 155 UNITS - 55 UNITS - 31 UNITS = 69 UNITS
69 UNITS - 31 UNITS -> 1710 (DIFFERENCE BETWEEN WASHER AND FRIDGE)
1 UNIT -> 45
NUMBER OF TV -> 55 X 45 = 2475
NUMBER OF FRIDGE -> 31 X 45 = 1395
NUMBER OF WASHER -> 69 X 45 = 3105
11 UNITS :20 UNITS
TOTAL UNITS -> 31
FRIDGE = TV + WASHER
1 UNIT :4 UNITS
TOTAL UNITS -> 5
SINCE BOTH CASE, NUMBER OF TOTAL NUMBER OF UNITS SHOULD BE THE SAME,
LOWEST COMMON MULTIPLE:
31 × 5 = 155 UNITS
TV -> 11/31 x 155 UNITS = 55 UNITS
FRIDGE -> 1/5 x 155 UNITS = 31 UNITS
WASHER -> 155 UNITS - 55 UNITS - 31 UNITS = 69 UNITS
69 UNITS - 31 UNITS -> 1710 (DIFFERENCE BETWEEN WASHER AND FRIDGE)
1 UNIT -> 45
NUMBER OF TV -> 55 X 45 = 2475
NUMBER OF FRIDGE -> 31 X 45 = 1395
NUMBER OF WASHER -> 69 X 45 = 3105
Date Posted:
2 years ago
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