题目内容
怎样简便就怎样算.
×37-
×37+73×
-19×
24×
+51×
69×
-13×
.
| 7 |
| 18 |
| 7 |
| 18 |
| 11 |
| 13 |
| 11 |
| 13 |
| 11 |
| 13 |
24×
| 51 |
| 43 |
| 19 |
| 43 |
69×
| 13 |
| 54 |
| 15 |
| 54 |
(1)
×37-
,
=
×(37-1),
=
×36,
=14;
(2)
×37+73×
-19×
,
=
×(37+73-19),
=
×91,
=77;
(3)24×
+51×
,
=24×
+
×19,
=(24+19)×
,
=43×
,
=51;
(4)69×
-13×
,
=23×
-5×
,
=(23-5)×
,
=18×
,
=13.
| 7 |
| 18 |
| 7 |
| 18 |
=
| 7 |
| 18 |
=
| 7 |
| 18 |
=14;
(2)
| 11 |
| 13 |
| 11 |
| 13 |
| 11 |
| 13 |
=
| 11 |
| 13 |
=
| 11 |
| 13 |
=77;
(3)24×
| 51 |
| 43 |
| 19 |
| 43 |
=24×
| 51 |
| 43 |
| 51 |
| 43 |
=(24+19)×
| 51 |
| 43 |
=43×
| 51 |
| 43 |
=51;
(4)69×
| 13 |
| 54 |
| 15 |
| 54 |
=23×
| 13 |
| 18 |
| 13 |
| 18 |
=(23-5)×
| 13 |
| 18 |
=18×
| 13 |
| 18 |
=13.
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