Răspuns :
Calculezi normal adica fix cum ai scris aici , sau le pui sub forma de fractie :1240-240/5 si 48+12552/2
(1240-240)÷5=1000÷5=200
(1240-240)÷5=1240÷5-240÷5=248-48=200
(48+12552)÷2=12600÷2=6300
(48+12552)÷2=48÷2+12552÷2=24+6276=6300
(1240-240)÷5=1240÷5-240÷5=248-48=200
(48+12552)÷2=12600÷2=6300
(48+12552)÷2=48÷2+12552÷2=24+6276=6300