题目内容
| 脱式计算. 893÷19+84×25 | (2.5-2.5×0.6)÷4 |
|
|
(1)893÷19+84×25,
=47+2100,
=2147;
(2)(2.5-2.5×0.6)÷4,
=(2.5-1.5)÷4,
=1÷4,
=
;
(3)
÷
-
×
,
=
×
-
×
,
=
-
,
=
;
(4)
÷[
×(
+
)],
=
÷[
×
],
=
÷
,
=
.
=47+2100,
=2147;
(2)(2.5-2.5×0.6)÷4,
=(2.5-1.5)÷4,
=1÷4,
=
| 1 |
| 4 |
(3)
| 4 |
| 7 |
| 2 |
| 3 |
| 5 |
| 14 |
| 3 |
| 5 |
=
| 4 |
| 7 |
| 3 |
| 2 |
| 5 |
| 14 |
| 3 |
| 5 |
=
| 6 |
| 7 |
| 3 |
| 14 |
=
| 9 |
| 14 |
(4)
| 9 |
| 20 |
| 1 |
| 2 |
| 2 |
| 5 |
| 4 |
| 5 |
=
| 9 |
| 20 |
| 1 |
| 2 |
| 6 |
| 5 |
=
| 9 |
| 20 |
| 3 |
| 5 |
=
| 3 |
| 4 |
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