题目内容
脱式计算:
306×15-2080
-
÷
+
3.5×(20.6-16.8÷4.8)
(
+
×
)÷
×[7-4÷(
+
)].
306×15-2080
| 9 |
| 10 |
| 1 |
| 3 |
| 1 |
| 2 |
| 5 |
| 6 |
3.5×(20.6-16.8÷4.8)
(
| 7 |
| 9 |
| 2 |
| 3 |
| 5 |
| 6 |
| 4 |
| 15 |
| 4 |
| 5 |
| 2 |
| 15 |
| 2 |
| 3 |
(1)306×15-2080
=4590-2080,
=2510;
(2)
-
÷
+
=
-
+
,
=
;
(3)3.5×(20.6-16.8÷4.8)
=3.5×(20.6-3.5),
=3.5×17.1,
=59.85;
(4)(
+
×
)÷
=(
+
)÷
,
=
×
,
=5;
(5)
×[7-4÷(
+
)]
=
×[7-4×
],
=
×[7-5],
=
×2,
=
.
=4590-2080,
=2510;
(2)
| 9 |
| 10 |
| 1 |
| 3 |
| 2 |
| 3 |
| 5 |
| 6 |
=
| 9 |
| 10 |
| 1 |
| 2 |
| 5 |
| 6 |
=
| 37 |
| 30 |
(3)3.5×(20.6-16.8÷4.8)
=3.5×(20.6-3.5),
=3.5×17.1,
=59.85;
(4)(
| 7 |
| 9 |
| 2 |
| 3 |
| 5 |
| 6 |
| 4 |
| 15 |
=(
| 7 |
| 9 |
| 5 |
| 9 |
| 4 |
| 15 |
=
| 4 |
| 3 |
| 15 |
| 4 |
=5;
(5)
| 4 |
| 5 |
| 2 |
| 15 |
| 2 |
| 3 |
=
| 4 |
| 5 |
| 15 |
| 12 |
=
| 4 |
| 5 |
=
| 4 |
| 5 |
=
| 8 |
| 5 |
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