题目内容
| 用递等式计算(能简单的要简单) ①
| ②
| ③(1-25%)×101-
| ④197×
| ||||||||||||||||||||||
⑤
| ⑥
| ⑦3
|
①
+
×
÷
,
=
+
×
,
=
+
,
=
+
,
=
;
②
+
-(
-
),
=
-
+
+
,
=1;
③(1-25%)×101-
,
=75%×101-75%,
=(101-1)×75%,
=100×75%,
=75;
④197×
+
,
=(196+1)×
+
,
=196×
+1×
+
,
=2+
×2,
=2
;
⑤
÷[
×(
-
)],
=
÷[
×(
-
)],
=
÷[
×
],
=
×24,
=16;
⑥
×2001+
+
,
=
+
+
,
=1;
⑦3
:x=1
:(1.6×5),
1
x=(1.6×5)×3
,
1
x÷1
=8×3
÷1
,
x=16.
| 5 |
| 9 |
| 4 |
| 9 |
| 9 |
| 20 |
| 6 |
| 5 |
=
| 5 |
| 9 |
| 1 |
| 5 |
| 5 |
| 6 |
=
| 5 |
| 9 |
| 1 |
| 6 |
=
| 10 |
| 18 |
| 3 |
| 18 |
=
| 13 |
| 18 |
②
| 11 |
| 13 |
| 7 |
| 12 |
| 11 |
| 13 |
| 5 |
| 12 |
=
| 11 |
| 13 |
| 11 |
| 13 |
| 7 |
| 12 |
| 5 |
| 12 |
=1;
③(1-25%)×101-
| 3 |
| 4 |
=75%×101-75%,
=(101-1)×75%,
=100×75%,
=75;
④197×
| 1 |
| 98 |
| 1 |
| 98 |
=(196+1)×
| 1 |
| 98 |
| 1 |
| 98 |
=196×
| 1 |
| 98 |
| 1 |
| 98 |
| 1 |
| 98 |
=2+
| 1 |
| 98 |
=2
| 1 |
| 49 |
⑤
| 2 |
| 3 |
| 3 |
| 4 |
| 17 |
| 18 |
| 8 |
| 9 |
=
| 2 |
| 3 |
| 3 |
| 4 |
| 17 |
| 18 |
| 16 |
| 18 |
=
| 2 |
| 3 |
| 3 |
| 4 |
| 1 |
| 18 |
=
| 2 |
| 3 |
=16;
⑥
| 1 |
| 2007 |
| 5 |
| 2007 |
| 1 |
| 2007 |
=
| 2001 |
| 2007 |
| 5 |
| 2007 |
| 1 |
| 2007 |
=1;
⑦3
| 1 |
| 2 |
| 3 |
| 4 |
1
| 3 |
| 4 |
| 1 |
| 2 |
1
| 3 |
| 4 |
| 3 |
| 4 |
| 1 |
| 2 |
| 3 |
| 4 |
x=16.
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