Samwell o na le lebenkele la didiriswa tsa eleketeroniki. Mo bekeng e, kotara ya thekiso ya gagwe ke dithelebishene tsa smart, nngwesufalola ke dithelebishene tsa analoge, mme tse di setseng ke dithelebishene tsa OLED. Fa e le gore ba kgonne go rekisa dithelebishene di le 40 ka palo yotlhe, ba kgonne go rekisa dithelebishene tsa OLED di le kae? 

Carrie was given ten twenties and 140 quarters by her aunt to use for lunch. If she spent all the quarters and 3/5 of the twenties, calculate the total amount of money she paid for the lunch.
Samwell o kgonne go rekisa 1/4 x 40 = <<1/4*40=10>>10 dithelebishene tsa Smart.
O kgonne go rekisa 1/8 x 40 = <<1/8*40=5>>5 dithelebishene tsa analoge. 
Ka jalo, o kgonne go rekisa 10 + 5 = <<10+5=15>>15 dithelebishene tsa  Analog le Smart.
Ka gone, palo yotlhe ya dithelebishene tsa OLED tse a kgonneng go di rekisa ke 40 - 15 = <<40-15=25>>25.
#### 25 

Since she spent all the quarters, she paid her lunch partly by quarters totaling 140*$0.25 = $<<140*0.25=35>>35
She also used 3/5*10 = <<3/5*10=6>>6 of the twenties to pay for the lunch.
The total amount of the twenties that she used is 6*$20 = $<<6*20=120>>120
She spent $120+$35 = $<<120+35=155>>155 on the lunch.
#### 155