题目内容
递等式计算:
| 360-225÷15×18 |
| 4.72-1.16-2.84 |
|
(1)360-225÷15×18,
=360-15×18,
=360-270,
=90;
(2)
÷
×
,
=
×
,
=
;
(3)4.72-1.16-2.84,
=4.72-(1.16+2.84),
=4.72-4,
=0.72;
(4)
+
÷
+
,
=
+
+
,
=
+
+
,
=1+
,
=1
.
=360-15×18,
=360-270,
=90;
(2)
| 3 |
| 5 |
| 5 |
| 6 |
| 8 |
| 15 |
=
| 18 |
| 25 |
| 8 |
| 15 |
=
| 48 |
| 125 |
(3)4.72-1.16-2.84,
=4.72-(1.16+2.84),
=4.72-4,
=0.72;
(4)
| 1 |
| 9 |
| 1 |
| 8 |
| 3 |
| 4 |
| 8 |
| 9 |
=
| 1 |
| 9 |
| 1 |
| 6 |
| 8 |
| 9 |
=
| 1 |
| 9 |
| 8 |
| 9 |
| 1 |
| 6 |
=1+
| 1 |
| 6 |
=1
| 1 |
| 6 |
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