PSLE A shop had a number of tablets for sale. After selling 209 of them in the morning and
111 of the remainder in the afternoon, it was left with
13 of the tablets. How many tablets were sold altogether?
Morning |
Remainder |
|
Afternoon |
Left |
209 |
1x1 |
10x1 |
2x10 |
1x10 |
19 u |
1 u |
10 u |
Fraction of the remainder left
= 1 -
111 =
1011 10x111x1 Remainder =
1x103x10 Total
1011 Remainder =
1030 Total
Number of tablets sold in the morning
= 20 u - 1 u
= 19 u
19 u = 209
1 u = 209 ÷ 19 = 11
Total number of tablets sold
= 20 u
= 20 x 11
= 220
Answer(s): 220