8.27 preguntas del examen
(1)8,27+5,84+1,73+2,16,
=(8,27+1,73)+(5,84+2,16),
=18,
=18.
(2)18.51-9.08-0.92,
=18.51-(9.08+0.92),
=18.51-10,
=8.51.
(3)528÷6×5-432,
=88×5-432,
=440-432 ,
=8.
(4)282×5+18×5,
=(282+18)×5,
=300×5,
=1500.
(5)75+360÷215,
=75+18+15,
=(75+15)+18,
=918,
=108.
(6)(641- 341)÷25×4,
=300÷25×4,
=12×4,
=48.