题目内容
用递等式计算
(1-0.05)÷1.9+0.1
×[1-(
-
)]
(
+
)÷
+
375+450÷18×25.
(1-0.05)÷1.9+0.1
| 4 |
| 29 |
| 3 |
| 4 |
| 3 |
| 8 |
(
| 4 |
| 5 |
| 1 |
| 4 |
| 7 |
| 3 |
| 7 |
| 10 |
375+450÷18×25.
(1)(1-0.05)÷1.9+0.1,
=0.95÷1.9+0.1,
=0.5+0.1,
=0.6;
(2)
×[1-(
-
)],
=
×[1-
],
=
×
,
=
;
(3)(
+
)÷
+
,
=
÷
+
,
=
+
,
=
;
(4)375+450÷18×25,
=375+25×25,
=375+625,
=1000.
=0.95÷1.9+0.1,
=0.5+0.1,
=0.6;
(2)
| 4 |
| 29 |
| 3 |
| 4 |
| 3 |
| 8 |
=
| 4 |
| 29 |
| 3 |
| 8 |
=
| 4 |
| 29 |
| 5 |
| 8 |
=
| 5 |
| 58 |
(3)(
| 4 |
| 5 |
| 1 |
| 4 |
| 7 |
| 3 |
| 7 |
| 10 |
=
| 21 |
| 20 |
| 7 |
| 3 |
| 7 |
| 10 |
=
| 9 |
| 20 |
| 7 |
| 10 |
=
| 23 |
| 20 |
(4)375+450÷18×25,
=375+25×25,
=375+625,
=1000.
练习册系列答案
相关题目