题目内容
“考考你”下面各题怎么算简便就怎么算?
|
|
| (
| ||||||||||||||||||||||
| 3
| 36×
| (
|
(1)
×101-
,
=
×(101-1),
=
×100,
=70;
(2)
×
÷
×
,
=
×
×
×
,
=(
×
)×(
×
),
=
×1,
=
;
(3)
×99+
,
=
×(99+1),
=
×100,
=60;
(4)(
+
)×
,
=
×
,
=
;
(5)
×
+
×
-
,
=(
+
-1)×
,
=
×
,
=
;
(6)3
×25,
=(3+
)×25,
=3×25+
×25,
=75+20,
=95;
(7)36×
,
=(35+1)×
,
=35×
+1×
,
=34+
,
=34
;
(8)(
-
)×
,
=
×
-
×
,
=3-2,
=1.
| 7 |
| 10 |
| 7 |
| 10 |
=
| 7 |
| 10 |
=
| 7 |
| 10 |
=70;
(2)
| 8 |
| 9 |
| 8 |
| 9 |
| 8 |
| 9 |
| 8 |
| 9 |
=
| 8 |
| 9 |
| 8 |
| 9 |
| 9 |
| 8 |
| 8 |
| 9 |
=(
| 8 |
| 9 |
| 8 |
| 9 |
| 9 |
| 8 |
| 8 |
| 9 |
=
| 64 |
| 81 |
=
| 64 |
| 81 |
(3)
| 3 |
| 5 |
| 3 |
| 5 |
=
| 3 |
| 5 |
=
| 3 |
| 5 |
=60;
(4)(
| 4 |
| 7 |
| 8 |
| 9 |
| 2 |
| 25 |
=
| 92 |
| 63 |
| 2 |
| 25 |
=
| 184 |
| 1575 |
(5)
| 15 |
| 21 |
| 3 |
| 4 |
| 10 |
| 21 |
| 3 |
| 4 |
| 3 |
| 4 |
=(
| 15 |
| 21 |
| 10 |
| 21 |
| 3 |
| 4 |
=
| 4 |
| 21 |
| 3 |
| 4 |
=
| 1 |
| 7 |
(6)3
| 4 |
| 5 |
=(3+
| 4 |
| 5 |
=3×25+
| 4 |
| 5 |
=75+20,
=95;
(7)36×
| 34 |
| 35 |
=(35+1)×
| 34 |
| 35 |
=35×
| 34 |
| 35 |
| 34 |
| 35 |
=34+
| 34 |
| 35 |
=34
| 34 |
| 35 |
(8)(
| 5 |
| 6 |
| 5 |
| 9 |
| 18 |
| 5 |
=
| 5 |
| 6 |
| 18 |
| 5 |
| 5 |
| 9 |
| 18 |
| 5 |
=3-2,
=1.
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