1)
a) 23 . 55 + 23 .45 -300
= 23.( 55+45) -300
=23.100 -300
=2300-300
=2000
b)44.97-44.87+4.16.25+60
= 44. (97-87) + 4 .16 .25 + 60
= 44 . 10 + 4 .16 . 25 +60
=440 + 64 .25 + 60
= 440 + 1600+60
=2040+60
=2100
c)( -25) +18+(-75)
= - ( 25 -18) + ( -75)
= - 7 + ( -75)
= -( 75 +7)
= - 82
d) 5^2 - 3^3 - ( 4^5 : 4^3 + 2^8: 2^6)
= 25 - 27 - ( 4^2 + 2^2)
= 25-27 - ( 16 + 4 )
=-2 - 20
=+ ( 20-2)
= 18
skymeo gửi bạn . Chúc bạn học tốt !😘😘