题目内容
计算下面各题,能简算的要简算.
| 2842÷14+74×3 |
| 5.2-11÷7-
| ||||||||||||||||||||||
|
| 1+
|
(1)2842÷14+74×3,
=203+222,
=425;
(2)
+
-
+
,
=(
-
)+(
+
),
=
+1,
=1
;
(3)5.2-11÷7-
×3,
=5.2-(11×
+
×3),
=5.2-(11+3)×
,
=5.2-14×
,
=5.2-2,
=3.2;
(4)
×4÷4×
,
=3÷4×
,
=
×
,
=
;
(5)
÷[(
-
)÷
],
=
÷[
×
],
=
÷
,
=12;
(6)1+
+
+
+
+
,
=1+(
+
+
+
+
),
=1+
,
=1
.
=203+222,
=425;
(2)
| 4 |
| 7 |
| 1 |
| 5 |
| 3 |
| 7 |
| 4 |
| 5 |
=(
| 4 |
| 7 |
| 3 |
| 7 |
| 4 |
| 5 |
| 1 |
| 5 |
=
| 1 |
| 7 |
=1
| 1 |
| 7 |
(3)5.2-11÷7-
| 1 |
| 7 |
=5.2-(11×
| 1 |
| 7 |
| 1 |
| 7 |
=5.2-(11+3)×
| 1 |
| 7 |
=5.2-14×
| 1 |
| 7 |
=5.2-2,
=3.2;
(4)
| 3 |
| 4 |
| 3 |
| 4 |
=3÷4×
| 3 |
| 4 |
=
| 3 |
| 4 |
| 3 |
| 4 |
=
| 9 |
| 16 |
(5)
| 6 |
| 5 |
| 3 |
| 4 |
| 2 |
| 3 |
| 5 |
| 6 |
=
| 6 |
| 5 |
| 1 |
| 12 |
| 6 |
| 5 |
=
| 6 |
| 5 |
| 1 |
| 10 |
=12;
(6)1+
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 16 |
| 1 |
| 32 |
=1+(
| 16 |
| 32 |
| 8 |
| 32 |
| 4 |
| 32 |
| 2 |
| 32 |
| 1 |
| 32 |
=1+
| 31 |
| 32 |
=1
| 31 |
| 32 |
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