题目内容
合理灵活地计算下列各题.
| 46×8-120÷5 |
| ||||||||
| 3.4×2.77+0.23×3.4 |
|
(1)46×8-120÷5,
=368-24,
=346;
(2)
+(
-
)×
,
=
+(
-
)×
,
=
+
×
,
=
+
,
=
+
,
=
;
(3)3.4×2.77+0.23×3.4,
=3.4×(2.77+0.23),
=3.4×3,
=10.2;
(4)
×7.7+3.3×0.8-80%,
=(7.7+3.3-1)×0.8,
=10×0.8,
=8;
=368-24,
=346;
(2)
| 2 |
| 3 |
| 4 |
| 5 |
| 2 |
| 3 |
| 5 |
| 3 |
=
| 2 |
| 3 |
| 12 |
| 15 |
| 10 |
| 15 |
| 5 |
| 3 |
=
| 2 |
| 3 |
| 2 |
| 15 |
| 5 |
| 3 |
=
| 2 |
| 3 |
| 2 |
| 9 |
=
| 6 |
| 9 |
| 2 |
| 9 |
=
| 8 |
| 9 |
(3)3.4×2.77+0.23×3.4,
=3.4×(2.77+0.23),
=3.4×3,
=10.2;
(4)
| 4 |
| 5 |
=(7.7+3.3-1)×0.8,
=10×0.8,
=8;
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