题目内容
脱式计算.(能简算的要简算)
|
|
| ||||||||||||||||||||||
| 5.58-
| 999
|
(1)
÷(
-
)
=
÷
,
=
;
(2)
×[
-(
-
)]
=
×[
+
-
],
=
×[1-
],
=
×
,
=
;
(3)
÷[
×(
+
)]
=
÷[
×
],
=
×15,
=9
;
(4)
÷
+
×
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(5)5.58-
+5.42-
=(5.58+5.42)-(
+
),
=11-1,
=10;
(6)999
+99
+9
+
.
=1000+100+10+
-
-
-
,
=1110+(
-
×3),
=1110+(
-
).
=1110+0,
=1110.
| 1 |
| 9 |
| 1 |
| 3 |
| 1 |
| 9 |
=
| 1 |
| 9 |
| 2 |
| 9 |
=
| 1 |
| 2 |
(2)
| 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 |
(3)
| 5 |
| 8 |
| 2 |
| 11 |
| 1 |
| 5 |
| 1 |
| 6 |
=
| 5 |
| 8 |
| 2 |
| 11 |
| 11 |
| 30 |
=
| 5 |
| 8 |
=9
| 3 |
| 8 |
(4)
| 7 |
| 9 |
| 11 |
| 5 |
| 2 |
| 9 |
| 5 |
| 11 |
=
| 7 |
| 9 |
| 5 |
| 11 |
| 2 |
| 9 |
| 5 |
| 11 |
=(
| 7 |
| 9 |
| 2 |
| 9 |
| 5 |
| 11 |
=1×
| 5 |
| 11 |
=
| 5 |
| 11 |
(5)5.58-
| 3 |
| 5 |
| 2 |
| 5 |
=(5.58+5.42)-(
| 3 |
| 5 |
| 2 |
| 5 |
=11-1,
=10;
(6)999
| 8 |
| 9 |
| 8 |
| 9 |
| 8 |
| 9 |
| 1 |
| 3 |
=1000+100+10+
| 1 |
| 3 |
| 1 |
| 9 |
| 1 |
| 9 |
| 1 |
| 9 |
=1110+(
| 1 |
| 3 |
| 1 |
| 9 |
=1110+(
| 1 |
| 3 |
| 1 |
| 3 |
=1110+0,
=1110.
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