题目内容
简算
|
4-
|
10.1×9.9 | ||||||||||||
30×(
|
76÷3+13×
|
(1)
×
+
×
,
=
×(
+
),
=
×1,
=
;
(2)4-
-
,
=4-(
+
),
=4-1
=3;
(3)10.1×9.9,
=10×9.9+0.1×9.9,
=99+0.99,
=99.99;
(4)30×(
+
-
),
=30×
+30×
-30×
,
=12+5-8,
=9;
(5)76÷3+13×
+
,
=76×
+13×
+
,
=(76+13+1)×
,
=90×
,
=30.
| 3 |
| 4 |
| 1 |
| 8 |
| 7 |
| 8 |
| 3 |
| 4 |
=
| 3 |
| 4 |
| 1 |
| 8 |
| 7 |
| 8 |
=
| 3 |
| 4 |
=
| 3 |
| 4 |
(2)4-
| 4 |
| 9 |
| 5 |
| 9 |
=4-(
| 4 |
| 9 |
| 5 |
| 9 |
=4-1
=3;
(3)10.1×9.9,
=10×9.9+0.1×9.9,
=99+0.99,
=99.99;
(4)30×(
| 2 |
| 5 |
| 1 |
| 6 |
| 4 |
| 15 |
=30×
| 2 |
| 5 |
| 1 |
| 6 |
| 4 |
| 15 |
=12+5-8,
=9;
(5)76÷3+13×
| 1 |
| 3 |
| 1 |
| 3 |
=76×
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
=(76+13+1)×
| 1 |
| 3 |
=90×
| 1 |
| 3 |
=30.
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