PSLE A shop had a number of hi-fi systems for sale. After selling 40 of them in the morning and
112 of the remainder in the afternoon, it was left with
12 of the hi-fi systems. How many hi-fi systems were sold altogether?
Morning |
Remainder |
|
Afternoon |
Left |
40 |
1x1 |
11x1 |
1x11 |
1x11 |
10 u |
1 u |
11 u |
Fraction of the remainder left
= 1 -
112 =
1112 11x112x1 Remainder =
1x112x11 Total
1112 Remainder =
1122 Total
Number of hi-fi systems sold in the morning
= 11 u - 1 u
= 10 u
10 u = 40
1 u = 40 ÷ 10 = 4
Total number of hi-fi systems sold
= 11 u
= 11 x 4
= 44
Answer(s): 44