Thực hiện phép tính a) (7 - 3 4/5) . 3 1/8 - 1 3/5 : (0,5)^2 b) |-1 5/8| + 1,25
Giải thích
a) 7−345.318−135:0,52=7−195.258−85:122=355−195.258−85.14=165.258−25=10−25=485.
b) −158+1,25:1−94 =−138+125100:44−94=138+54:−54 =138+54.−45=138+−1=58.
a) 7−345.318−135:0,52=7−195.258−85:122=355−195.258−85.14=165.258−25=10−25=485.
b) −158+1,25:1−94 =−138+125100:44−94=138+54:−54 =138+54.−45=138+−1=58.