①[(915-712)÷234]÷115②0.52×249+759×0.52③(125-45)×(2+23)÷135④[(4.25-318)×2.4+10÷614]÷0.13⑤24×(712+56)÷(6.375-538)⑥(1535÷3-223×178)÷138.-数学
+10÷
]÷
;
=[
×
+10×
]÷
;
=[
+
]÷
;
=
×
;
=33
;
(5)24×(
+
)÷(6.375-5
)
=24×
÷(6
-5
);
=34×1;
=34;
(6)(15
÷3-2
×1
)÷1
=(
×
-
25 |
4 |
13 |
100 |
=[
9 |
8 |
12 |
5 |
4 |
25 |
13 |
100 |
=[
27 |
10 |
8 |
5 |
13 |
100 |
=
43 |
10 |
100 |
13 |
=33
1 |
13 |
(5)24×(
7 |
12 |
5 |
6 |
3 |
8 |
=24×
17 |
12 |
3 |
8 |
3 |
8 |
=34×1;
=34;
(6)(15
3 |
5 |
2 |
3 |
7 |
8 |
3 |
8 |
=(
78 |
5 |
1 |
3 |