题目内容
下面各题,怎样简便就就怎样算.
(1)0.65×
+0.35×25%
(2)(
+
)÷
+
(3)
(4)(111+999)÷[56×(
-
)].
(1)0.65×
| 1 |
| 4 |
(2)(
| 4 |
| 5 |
| 1 |
| 4 |
| 7 |
| 3 |
| 7 |
| 10 |
(3)
| 1.7×2.5×0.4 |
| 0.25×1.6×34 |
(4)(111+999)÷[56×(
| 3 |
| 7 |
| 3 |
| 8 |
(1)0.65×
+0.35×25%,
=(0.65+0.35)×
,
=1×
,
=
;
(2)(
+
)÷
+
,
=
÷
+
,
=
+
,
=1
;
(3)
,
=
,
=
;
(4)(111+999)÷[56×(
-
)],
=1110÷[56×
-56×
],
=1110÷3,
=370.
| 1 |
| 4 |
=(0.65+0.35)×
| 1 |
| 4 |
=1×
| 1 |
| 4 |
=
| 1 |
| 4 |
(2)(
| 4 |
| 5 |
| 1 |
| 4 |
| 7 |
| 3 |
| 7 |
| 10 |
=
| 21 |
| 20 |
| 7 |
| 3 |
| 7 |
| 10 |
=
| 9 |
| 20 |
| 7 |
| 10 |
=1
| 3 |
| 20 |
(3)
| 1.7×2.5×0.4 |
| 0.25×1.6×34 |
=
| 1×10×1 |
| 1×4×20 |
=
| 1 |
| 8 |
(4)(111+999)÷[56×(
| 3 |
| 7 |
| 3 |
| 8 |
=1110÷[56×
| 3 |
| 7 |
| 3 |
| 8 |
=1110÷3,
=370.
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