题目内容
| 计算下面各题,能简算的要简算. 30×(
| 98×
| (
| ||||||||||||||||||
(
|
|
|
(1)30×(
+
),
=30×
+30×
,
=12+5,
=17;
(2)98×
+98×
,
=98×(
+
),
=98×1,
=98;
(3)(
-
)÷
+
,
=
÷
+
,
=
+
,
=1;
(4)(
+
+
)×24,
=
×24+
×24+
×24,
=12+8+6,
=26;
(5)
×
+
÷6,
=
×
+
×
,
=
×(
+
),
=
×1,
=
;
(6)
-(
+
),
=
-
-
,
=1-
,
=
.
| 2 |
| 5 |
| 1 |
| 6 |
=30×
| 2 |
| 5 |
| 1 |
| 6 |
=12+5,
=17;
(2)98×
| 4 |
| 7 |
| 3 |
| 7 |
=98×(
| 4 |
| 7 |
| 3 |
| 7 |
=98×1,
=98;
(3)(
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 2 |
| 5 |
| 6 |
=
| 1 |
| 12 |
| 1 |
| 2 |
| 5 |
| 6 |
=
| 1 |
| 6 |
| 5 |
| 6 |
=1;
(4)(
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=12+8+6,
=26;
(5)
| 4 |
| 9 |
| 1 |
| 6 |
| 5 |
| 9 |
=
| 4 |
| 9 |
| 1 |
| 6 |
| 5 |
| 9 |
| 1 |
| 6 |
=
| 1 |
| 6 |
| 5 |
| 9 |
| 4 |
| 9 |
=
| 1 |
| 6 |
=
| 1 |
| 6 |
(6)
| 13 |
| 12 |
| 1 |
| 12 |
| 1 |
| 5 |
=
| 13 |
| 12 |
| 1 |
| 12 |
| 1 |
| 5 |
=1-
| 1 |
| 5 |
=
| 4 |
| 5 |
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