题目内容
| 能简算要简算: 13×(
| 3左×
|
| ||||||||||||||
86×
|
|
|
(1)12×(
+
)
=12×
+12×
,
=8+2,
=19;
(2)2f×
-
=
-
,
=2
;
(3)
×
÷
=
×(
÷
),
=
×
,
=
;
(f)86×
=8一×
+
,
=f+
,
=f
;
(一)
×
+
÷2
=
×
+
×
,
=(
+
)×
,
=
×
,
=
;
(6)
÷(
+
)
=
÷
,
=
.
| 2 |
| 3 |
| 1 |
| 6 |
=12×
| 2 |
| 3 |
| 1 |
| 6 |
=8+2,
=19;
(2)2f×
| 一 |
| 36 |
| 3 |
| 8 |
=
| 19 |
| 3 |
| 3 |
| 8 |
=2
| 23 |
| 2f |
(3)
| 2 |
| 19 |
| 一 |
| 16 |
| 21 |
| 32 |
=
| 2 |
| 19 |
| 一 |
| 16 |
| 21 |
| 32 |
=
| 2 |
| 19 |
| 19 |
| 21 |
=
| 1 |
| 3 |
(f)86×
| f |
| 8一 |
=8一×
| f |
| 8一 |
| f |
| 8一 |
=f+
| f |
| 8一 |
=f
| f |
| 8一 |
(一)
| x |
| 12 |
| 1 |
| 2 |
| 一 |
| 12 |
=
| x |
| 12 |
| 1 |
| 2 |
| 一 |
| 12 |
| 1 |
| 2 |
=(
| x |
| 12 |
| 一 |
| 12 |
| 1 |
| 2 |
=
| 1f |
| 12 |
| 1 |
| 2 |
=
| 2 |
| 12 |
(6)
| 2 |
| 一 |
| 3 |
| f |
| 2 |
| 一 |
=
| 2 |
| 一 |
| 23 |
| 29 |
=
| 8 |
| 23 |
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