题目内容
用递等式计算(能简算的要简算)
×
÷(
-
)
25%÷(3-
-
)
2.42÷
+4.58×
+3÷4.
| 1 |
| 6 |
| 2 |
| 3 |
| 13 |
| 15 |
| 4 |
| 5 |
25%÷(3-
| 5 |
| 13 |
| 8 |
| 13 |
2.42÷
| 4 |
| 3 |
| 3 |
| 4 |
(1)
×
÷(
-
),
=
×
÷
,
=
÷
,
=1
;
(2)25%÷(3-
-
),
=25%÷[3-(
+
)],
=25%÷[3-1],
=25%÷2,
=
;
(3)2.42÷
+4.58×
+3÷4,
=2.42×
+4.58×
+
,
=(2.42+4.58+1)×
,
=8×
,
=6.
| 1 |
| 6 |
| 2 |
| 3 |
| 13 |
| 15 |
| 4 |
| 5 |
=
| 1 |
| 6 |
| 2 |
| 3 |
| 1 |
| 15 |
=
| 1 |
| 9 |
| 1 |
| 15 |
=1
| 2 |
| 3 |
(2)25%÷(3-
| 5 |
| 13 |
| 8 |
| 13 |
=25%÷[3-(
| 5 |
| 13 |
| 8 |
| 13 |
=25%÷[3-1],
=25%÷2,
=
| 1 |
| 8 |
(3)2.42÷
| 4 |
| 3 |
| 3 |
| 4 |
=2.42×
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
=(2.42+4.58+1)×
| 3 |
| 4 |
=8×
| 3 |
| 4 |
=6.
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