Calculaţi: a) 3,75 - 2:0,25 +1,4-3,55 +1,2³?;
b) 6,24:0,4+7,65 -20 -1000 -0,01•5²​


Răspuns :

[tex]\bold{a)} \ 3,75-2:0,25+1,4-3,55+(1,2)^3=\\=3,75-8+1,4-3,55+1,728=\\=-4,25+1,4-3,55+1,728=\\=-2,85-3,55+1,728=\\=-6,4+1,728=\boxed{-4,672};\\ \bold{b)} \ 6,24:0,4+7,65-20-1 \ 000-0,01\cdot 5^2=\\=15,6+7,65-20-1 \ 000-0,01\cdot 25=\\=23,25-20-1 \ 000-0,25=\\=3,25-1 \ 000-0,25= \\ =-996,75-0,25=\boxed{-997};[/tex]