题目内容
3×25%+3×
| (
|
|
| ||||||||||||||||||||||
400÷(1+
|
| 27×
|
(1)3×25%+3×
,
=3×(25%+
),
=3×(
+
),
=3×1,
=3;
(2)
+
÷50%,
=
+
÷
,
=
+
×2,
=
+
,
=
;
(3)(
+
+
)×30,
=
×30+
×30+
×30,
=5+3+4,
=12;
(4)
÷(1-
-
),
=
÷
,
=1;
(5)
×36+
×36-36,
=(
+
-1)×36,
=0×36,
=0;
(6)400÷(1+
)-200×
,
=400÷
-10,
=400×
-10,
=300-10,
=290;
(7)
×(
×
),
=
×
×
,
=
;
(8)27×
+27÷5,
=27×
+27×
,
=27×(
+
),
=27×1,
=27.
| 3 |
| 4 |
=3×(25%+
| 3 |
| 4 |
=3×(
| 1 |
| 4 |
| 3 |
| 4 |
=3×1,
=3;
(2)
| 1 |
| 3 |
| 2 |
| 3 |
=
| 1 |
| 3 |
| 2 |
| 3 |
| 1 |
| 2 |
=
| 1 |
| 3 |
| 2 |
| 3 |
=
| 1 |
| 3 |
| 4 |
| 3 |
=
| 5 |
| 3 |
(3)(
| 1 |
| 6 |
| 1 |
| 10 |
| 2 |
| 15 |
=
| 1 |
| 6 |
| 1 |
| 10 |
| 2 |
| 15 |
=5+3+4,
=12;
(4)
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 1 |
| 4 |
=1;
(5)
| 5 |
| 8 |
| 3 |
| 8 |
=(
| 5 |
| 8 |
| 3 |
| 8 |
=0×36,
=0;
(6)400÷(1+
| 1 |
| 3 |
| 1 |
| 20 |
=400÷
| 4 |
| 3 |
=400×
| 3 |
| 4 |
=300-10,
=290;
(7)
| 5 |
| 6 |
| 2 |
| 5 |
| 1 |
| 7 |
=
| 5 |
| 6 |
| 2 |
| 5 |
| 1 |
| 7 |
=
| 1 |
| 21 |
(8)27×
| 4 |
| 5 |
=27×
| 4 |
| 5 |
| 1 |
| 5 |
=27×(
| 4 |
| 5 |
| 1 |
| 5 |
=27×1,
=27.
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