题目内容
①6
×
+
×6
+6.75×3
②(
÷
+
)×0.25
③13
×1
×[3
+(12.4-12
)].
| 3 |
| 4 |
| 2 |
| 5 |
| 3 |
| 5 |
| 3 |
| 4 |
②(
| 5 |
| 18 |
| 1 |
| 3 |
| 5 |
| 18 |
③13
| 1 |
| 3 |
| 1 |
| 5 |
| 5 |
| 6 |
| 8 |
| 45 |
(1)6
×
+
×6
+6.75×3,
=6
×(
+
+3),
=6
×(1+3),
=6
×4,
=27;
(2)(
÷
+
)×0.25,
=(
+
)×0.25,
=
×0.25,
=
;
(3)13
×1
×[3
+(12.4-12
)],
=13
×1
×[3
+
],
=13
×1
×
,
=
×
×
,
=
.
| 3 |
| 4 |
| 2 |
| 5 |
| 3 |
| 5 |
| 3 |
| 4 |
=6
| 3 |
| 4 |
| 2 |
| 5 |
| 3 |
| 5 |
=6
| 3 |
| 4 |
=6
| 3 |
| 4 |
=27;
(2)(
| 5 |
| 18 |
| 1 |
| 3 |
| 5 |
| 18 |
=(
| 5 |
| 6 |
| 5 |
| 18 |
=
| 10 |
| 9 |
=
| 5 |
| 18 |
(3)13
| 1 |
| 3 |
| 1 |
| 5 |
| 5 |
| 6 |
| 8 |
| 45 |
=13
| 1 |
| 3 |
| 1 |
| 5 |
| 5 |
| 6 |
| 2 |
| 9 |
=13
| 1 |
| 3 |
| 1 |
| 5 |
| 73 |
| 18 |
=
| 40 |
| 3 |
| 6 |
| 5 |
| 73 |
| 18 |
=
| 584 |
| 9 |
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