题目内容
计算下面各题,能简算的要简算.
67×
-
1.9-1.9×(1.9-1.9)
0.7+3.9+4.3+6.1
×[
-(
-
)].
67×
| 4 |
| 11 |
| 4 |
| 11 |
1.9-1.9×(1.9-1.9)
0.7+3.9+4.3+6.1
| 8 |
| 9 |
| 3 |
| 4 |
| 7 |
| 16 |
| 1 |
| 4 |
(1)67×
-
,
=(66+1)×
-
,
=66×
+1×
-
,
=24+
-
,
=24;
(2)1.9-1.9×(1.9-1.9),
=1.9-1.9×0,
=1.9-0,
=1.9;
(3)0.7+3.9+4.3+6.1,
=(0.7+4.3)+(3.9+6.1),
=5+10,
=15;
(4)
×[
-(
-
)],
=
×[
+
-
],
=
×[1-
],
=
×
,
=
.
| 4 |
| 11 |
| 4 |
| 11 |
=(66+1)×
| 4 |
| 11 |
| 4 |
| 11 |
=66×
| 4 |
| 11 |
| 4 |
| 11 |
| 4 |
| 11 |
=24+
| 4 |
| 11 |
| 4 |
| 11 |
=24;
(2)1.9-1.9×(1.9-1.9),
=1.9-1.9×0,
=1.9-0,
=1.9;
(3)0.7+3.9+4.3+6.1,
=(0.7+4.3)+(3.9+6.1),
=5+10,
=15;
(4)
| 8 |
| 9 |
| 3 |
| 4 |
| 7 |
| 16 |
| 1 |
| 4 |
=
| 8 |
| 9 |
| 3 |
| 4 |
| 1 |
| 4 |
| 7 |
| 16 |
=
| 8 |
| 9 |
| 7 |
| 16 |
=
| 8 |
| 9 |
| 9 |
| 16 |
=
| 1 |
| 2 |
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