题目内容
计算下列各题.
117×21-92×5
-
×
+
(0.75+0.2)÷0.25×0.5
(
-
)×
÷3 (
-
)÷(2-
)
÷【
×(
-
)】.
117×21-92×5
| 42 |
| 5 |
| 42 |
| 5 |
| 5 |
| 7 |
| 12 |
| 5 |
(
| 5 |
| 6 |
| 1 |
| 2 |
| 1 |
| 2 |
| 11 |
| 12 |
| 3 |
| 4 |
| 1 |
| 2 |
| 39 |
| 10 |
| 13 |
| 2 |
| 21 |
| 10 |
| 8 |
| 5 |
117×21-92×5
=2457-460,
=1997;
-
×
+
=8
-6+2
,
=2
+2
,
=4
;
(0.75+0.2)÷0.25×0.5
=0.95÷0.25×0.5,
=3.8×0.5,
=1.9;
(
-
)×
÷3
=
×
×
,
=
;
(
-
)×(2-
)
=
×
,
=
;
÷[
×(
-
)]
=
÷[
×
],
=
×
,
=
.
=2457-460,
=1997;
| 42 |
| 5 |
| 42 |
| 5 |
| 5 |
| 7 |
| 12 |
| 5 |
=8
| 2 |
| 5 |
| 2 |
| 5 |
=2
| 2 |
| 5 |
| 2 |
| 5 |
=4
| 4 |
| 5 |
(0.75+0.2)÷0.25×0.5
=0.95÷0.25×0.5,
=3.8×0.5,
=1.9;
(
| 5 |
| 6 |
| 1 |
| 2 |
| 1 |
| 2 |
=
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 3 |
=
| 1 |
| 18 |
(
| 11 |
| 12 |
| 3 |
| 4 |
| 1 |
| 2 |
=
| 1 |
| 6 |
| 3 |
| 2 |
=
| 1 |
| 4 |
| 39 |
| 10 |
| 13 |
| 2 |
| 21 |
| 10 |
| 8 |
| 5 |
=
| 39 |
| 10 |
| 13 |
| 2 |
| 1 |
| 2 |
=
| 39 |
| 10 |
| 4 |
| 13 |
=
| 6 |
| 5 |
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