题目内容
| 怎样简便就怎样算. (5-
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| (
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(1)(5-
)×26
=5×26-
×26
=130-10
=120;
(2)
×
+
×
=
×(
+
)
=
×1
=
;
(3)
×
×27×33
=(
×27)×(
×33)
=6×15
=90;
(4)(
+
)×24
=
×24+
×24
=2+20
=22;
(5)
+
×
=
+
=
;
(6)
×34+53×
-
=
×(34+53-1)
=
×86
=38.
| 5 |
| 13 |
=5×26-
| 5 |
| 13 |
=130-10
=120;
(2)
| 5 |
| 7 |
| 1 |
| 4 |
| 3 |
| 4 |
| 5 |
| 7 |
=
| 5 |
| 7 |
| 1 |
| 4 |
| 3 |
| 4 |
=
| 5 |
| 7 |
=
| 5 |
| 7 |
(3)
| 2 |
| 9 |
| 5 |
| 11 |
=(
| 2 |
| 9 |
| 5 |
| 11 |
=6×15
=90;
(4)(
| 1 |
| 12 |
| 5 |
| 6 |
=
| 1 |
| 12 |
| 5 |
| 6 |
=2+20
=22;
(5)
| 1 |
| 4 |
| 3 |
| 4 |
| 3 |
| 1 |
=
| 1 |
| 4 |
| 9 |
| 4 |
=
| 5 |
| 2 |
(6)
| 19 |
| 43 |
| 19 |
| 43 |
| 19 |
| 43 |
=
| 19 |
| 43 |
=
| 19 |
| 43 |
=38.
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