题目内容
| 直接写出计算结果 ①2-7×
| ②17-17×
| ③1-
| ④20.1+
| ||||||||||
| ⑤0.1252= | ⑥252÷153= | ⑦
| ⑧(
|
①2-7×
,
=2-2,
=0;
②17-17×
,
=17×(1-
),
=17×
,
=
;
③1-
-
,
=
-
,
=
;
④20.1+
-0.375,
=20.35-0.375,
=19.975;
⑤0.1252,
=0.125×0.125,
=0.015625;
⑥252÷153,
=
,
=
;
⑦
×98÷
×100,
=(
×
)×(98×100),
=
×9800,
=
;
⑧(
+
)×23+
,
=
×23+
×23+
,
=
+
+
,
=
+
+
,
=1+
,
=1
.
| 2 |
| 7 |
=2-2,
=0;
②17-17×
| 17 |
| 18 |
=17×(1-
| 17 |
| 18 |
=17×
| 1 |
| 18 |
=
| 17 |
| 18 |
③1-
| 1 |
| 2 |
| 1 |
| 3 |
=
| 1 |
| 2 |
| 1 |
| 3 |
=
| 1 |
| 6 |
④20.1+
| 1 |
| 4 |
=20.35-0.375,
=19.975;
⑤0.1252,
=0.125×0.125,
=0.015625;
⑥252÷153,
=
| 25×25 |
| 15×15×15 |
=
| 5 |
| 27 |
⑦
| 5 |
| 8 |
| 3 |
| 8 |
=(
| 5 |
| 8 |
| 8 |
| 3 |
=
| 5 |
| 3 |
=
| 49000 |
| 3 |
⑧(
| 2 |
| 71 |
| 1 |
| 69 |
| 25 |
| 71 |
=
| 2 |
| 71 |
| 1 |
| 69 |
| 25 |
| 71 |
=
| 46 |
| 71 |
| 1 |
| 3 |
| 25 |
| 71 |
=
| 46 |
| 71 |
| 25 |
| 71 |
| 1 |
| 3 |
=1+
| 1 |
| 3 |
=1
| 1 |
| 3 |
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