题目内容
下面各题,怎样算简便就怎样算.
(1)
-
-
+
(2)87×
(3)
÷5+5÷
(4)
÷(
-
×
)
(1)
| 11 |
| 10 |
| 1 |
| 4 |
| 3 |
| 4 |
| 9 |
| 10 |
(2)87×
| 7 |
| 88 |
(3)
| 5 |
| 9 |
| 5 |
| 9 |
(4)
| 4 |
| 15 |
| 13 |
| 9 |
| 2 |
| 3 |
| 5 |
| 6 |
(1)
-
-
+
,
=(
+
)-(
+
),
=2-1,
=1;
(2)87×
,
=(88-1)×
,
=7-
,
=6
;
(3)
÷5+5÷
,
=
×
+5×
,
=
+9,
=9
;
(4)
÷(
-
×
),
=
÷(
-
),
=
×
,
=
.
| 11 |
| 10 |
| 1 |
| 4 |
| 3 |
| 4 |
| 9 |
| 10 |
=(
| 11 |
| 10 |
| 9 |
| 10 |
| 1 |
| 4 |
| 3 |
| 4 |
=2-1,
=1;
(2)87×
| 7 |
| 88 |
=(88-1)×
| 7 |
| 88 |
=7-
| 7 |
| 88 |
=6
| 81 |
| 88 |
(3)
| 5 |
| 9 |
| 5 |
| 9 |
=
| 5 |
| 9 |
| 1 |
| 5 |
| 9 |
| 5 |
=
| 1 |
| 9 |
=9
| 1 |
| 9 |
(4)
| 4 |
| 15 |
| 13 |
| 9 |
| 2 |
| 3 |
| 5 |
| 6 |
=
| 4 |
| 15 |
| 13 |
| 9 |
| 5 |
| 9 |
=
| 4 |
| 15 |
| 9 |
| 8 |
=
| 3 |
| 10 |
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