计算. 4.05-2
计算.4.05-2.8-0.7375+450÷18×25(45+14)÷73+7101-15-162÷[1?(13+59)]8.5+(5.6-4.8)×12....
计算. 4.05-2.8-0.7 375+450÷18×25 (45+14)÷73+710 1-15-16 2÷[1?(13+59)] 8.5+(5.6-4.8)×12.
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(1)4.05-2.8-0.7
=4.05-(2.8+0.7)
=4.05-3.5
=0.55;
(2)375+450÷18×25
=375+25×25
=375+625
=1000;
(3)(
+
)÷
+
=
×
+
=
+
=
;
(4)1-
-
=1-(
+
)
=1-
=
;
(5)2÷[1-(
+
)]
=2÷[1-
]
=2÷
=18;
(6)8.5+(5.6-4.8)×12
=8.5+0.8×12
=8.5+9.6
=18.1.
=4.05-(2.8+0.7)
=4.05-3.5
=0.55;
(2)375+450÷18×25
=375+25×25
=375+625
=1000;
(3)(
4 |
5 |
1 |
4 |
7 |
3 |
7 |
10 |
=
21 |
20 |
3 |
7 |
7 |
10 |
=
9 |
20 |
7 |
10 |
=
23 |
20 |
(4)1-
1 |
5 |
1 |
6 |
=1-(
1 |
5 |
1 |
6 |
=1-
11 |
30 |
=
19 |
30 |
(5)2÷[1-(
1 |
3 |
5 |
9 |
=2÷[1-
8 |
9 |
=2÷
1 |
9 |
=18;
(6)8.5+(5.6-4.8)×12
=8.5+0.8×12
=8.5+9.6
=18.1.
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