Rút gọn các phân số sau:
a
)
9.6
−
9.3
18
;
b
)
17.5
−
17
3
−
20
;
c
)
49
+
7.49
49
d
)
9
13.3
2
−
4.3
2
;
e
)
(
−
5
)
.4
+
8.
(
−
7
)
(
−
12
)
.5
+
7.4
;
...
Đọc tiếp
Rút gọn các phân số sau:
a ) 9.6 − 9.3 18 ; b ) 17.5 − 17 3 − 20 ; c ) 49 + 7.49 49
d ) 9 13.3 2 − 4.3 2 ; e ) ( − 5 ) .4 + 8. ( − 7 ) ( − 12 ) .5 + 7.4 ; f ) ( − 14 ) .11 + 14.2 11.21 − 7.22
a) 3 2
b) -4
c) 8
d) 1 9
e) 19 8
f) − 18 11
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