题目内容
简算
①9
-(3
+0.4)
②1.8×
+2.2×25%
③
×[0.75-(
-
)].
①9
| 2 |
| 5 |
| 3 |
| 7 |
②1.8×
| 1 |
| 4 |
③
| 8 |
| 9 |
| 7 |
| 16 |
| 1 |
| 4 |
①9
-(3
+0.4),
=9
-3
-0.4,
=9
-
-3
,
=9-3
,
=5
;
②1.8×
+2.2×25%,
=(1.8+2.2)×
,
=4×
,
=1;
③
×[0.75-(
-
)],
=
×[0.75-
+
],
=
×[
+
-
],
=
×(1-
),
=
×
,
=
.
| 2 |
| 5 |
| 3 |
| 7 |
=9
| 2 |
| 5 |
| 3 |
| 7 |
=9
| 2 |
| 5 |
| 2 |
| 5 |
| 3 |
| 7 |
=9-3
| 3 |
| 7 |
=5
| 4 |
| 7 |
②1.8×
| 1 |
| 4 |
=(1.8+2.2)×
| 1 |
| 4 |
=4×
| 1 |
| 4 |
=1;
③
| 8 |
| 9 |
| 7 |
| 16 |
| 1 |
| 4 |
=
| 8 |
| 9 |
| 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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