题目内容
能简算的要简算.
(1)5.5-62.5%-
+3
;
(2)24×(25%-
+0.125);
(3)
×
+0.4+
×40%.
(1)5.5-62.5%-
| 3 |
| 8 |
| 2 |
| 5 |
(2)24×(25%-
| 1 |
| 6 |
(3)
| 2 |
| 5 |
| 3 |
| 7 |
| 4 |
| 7 |
(1)5.5-62.5%-
+3
=5.5-0.625-0.375+3.4
=5.5-(0.625+0.375)+3.4
=5.5-1+3.4
=4.5+3.4
=7.9;
(2)24×(25%-
+0.125)
=24×(
-
+
)
=24×
-24×
+24×
=6-4+3
=5;
(3)
×
+0.4+
×40%
=
×
+
×1+
×
=
×(
+1+
)
=
×2
=
.
| 3 |
| 8 |
| 2 |
| 5 |
=5.5-0.625-0.375+3.4
=5.5-(0.625+0.375)+3.4
=5.5-1+3.4
=4.5+3.4
=7.9;
(2)24×(25%-
| 1 |
| 6 |
=24×(
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 8 |
=24×
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 8 |
=6-4+3
=5;
(3)
| 2 |
| 5 |
| 3 |
| 7 |
| 4 |
| 7 |
=
| 2 |
| 5 |
| 3 |
| 7 |
| 2 |
| 5 |
| 4 |
| 7 |
| 2 |
| 5 |
=
| 2 |
| 5 |
| 3 |
| 7 |
| 4 |
| 7 |
=
| 2 |
| 5 |
=
| 4 |
| 5 |
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