题目内容
脱式计算,怎样简便就怎样算.
23×
| 14
|
| ||||||||||||||||||||||
| 3×(
| (1
|
(1)23×
+14×
=
×(23+16)
=
×39
=14;
(2)14
-6.46-3.54
=14
-(6.46+3.54)
=14
-10
=4
;
(3)
+
×(
-
)
=
+
×
-
×
=
+
-
=
;
(4)
×
+
÷
=
×
+
×
=
×(
+
)
=
;
(5)3×(
+
)-
=3×
+3×
-
=
+
-
=
;
(6)(1
-1
)÷(6-
)×4
=1
÷5
×4
=
×
×
=
.
| 14 |
| 39 |
| 16 |
| 39 |
=
| 14 |
| 39 |
=
| 14 |
| 39 |
=14;
(2)14
| 3 |
| 17 |
=14
| 3 |
| 17 |
=14
| 3 |
| 17 |
=4
| 3 |
| 17 |
(3)
| 1 |
| 13 |
| 12 |
| 13 |
| 5 |
| 2 |
| 1 |
| 3 |
=
| 1 |
| 13 |
| 12 |
| 13 |
| 5 |
| 2 |
| 12 |
| 13 |
| 1 |
| 3 |
=
| 1 |
| 13 |
| 30 |
| 13 |
| 4 |
| 13 |
=
| 27 |
| 13 |
(4)
| 3 |
| 13 |
| 3 |
| 4 |
| 10 |
| 13 |
| 4 |
| 3 |
=
| 3 |
| 13 |
| 3 |
| 4 |
| 10 |
| 13 |
| 3 |
| 4 |
=
| 3 |
| 4 |
| 3 |
| 13 |
| 10 |
| 13 |
=
| 3 |
| 4 |
(5)3×(
| 2 |
| 15 |
| 1 |
| 12 |
| 1 |
| 4 |
=3×
| 2 |
| 15 |
| 1 |
| 12 |
| 1 |
| 4 |
=
| 6 |
| 15 |
| 1 |
| 4 |
| 1 |
| 4 |
=
| 2 |
| 5 |
(6)(1
| 2 |
| 3 |
| 2 |
| 5 |
| 2 |
| 7 |
| 2 |
| 7 |
=1
| 4 |
| 15 |
| 5 |
| 7 |
| 2 |
| 7 |
=
| 19 |
| 15 |
| 7 |
| 40 |
| 30 |
| 7 |
=
| 19 |
| 20 |
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