题目内容
怎样简便怎样算
3÷
-
÷3
(
-
+
)×12
÷[
×(
+
)]
0.625×(8.3-2.5×12%)
6.8×2.5+2.5×3.2
×
+
÷
.
3÷
| 3 |
| 7 |
| 3 |
| 7 |
(
| 1 |
| 3 |
| 1 |
| 6 |
| 1 |
| 4 |
| 11 |
| 20 |
| 1 |
| 2 |
| 2 |
| 3 |
| 4 |
| 5 |
0.625×(8.3-2.5×12%)
6.8×2.5+2.5×3.2
| 7 |
| 4 |
| 5 |
| 8 |
| 1 |
| 4 |
| 8 |
| 5 |
(1)3÷
-
÷3,
=3×
-
×
,
=7-
,
=6
;
(2)(
-
+
)×12,
=
×12-
×12+
×12,
=4-2+3,
=5;
(3)
÷[
×(
+
)],
=
÷[
×
+
×
],
=
÷[
+
],
=
×
,
=
;
(4)0.625×(8.3-2.5×12%),
=0.625×(8.3-0.3),
=
×8,
=5;
(5)6.8×2.5+2.5×3.2,
=(6.8+3.2)×2.5,
=10×2.5,
=25;
(6)
×
+
÷
=
×
+
×
,
=(
+
)×
,
=
×
,
=
,
=1
.
| 3 |
| 7 |
| 3 |
| 7 |
=3×
| 7 |
| 3 |
| 3 |
| 7 |
| 1 |
| 3 |
=7-
| 1 |
| 7 |
=6
| 6 |
| 7 |
(2)(
| 1 |
| 3 |
| 1 |
| 6 |
| 1 |
| 4 |
=
| 1 |
| 3 |
| 1 |
| 6 |
| 1 |
| 4 |
=4-2+3,
=5;
(3)
| 11 |
| 20 |
| 1 |
| 2 |
| 2 |
| 3 |
| 4 |
| 5 |
=
| 11 |
| 20 |
| 1 |
| 2 |
| 2 |
| 3 |
| 1 |
| 2 |
| 4 |
| 5 |
=
| 11 |
| 20 |
| 1 |
| 3 |
| 2 |
| 5 |
=
| 11 |
| 20 |
| 15 |
| 11 |
=
| 3 |
| 4 |
(4)0.625×(8.3-2.5×12%),
=0.625×(8.3-0.3),
=
| 5 |
| 8 |
=5;
(5)6.8×2.5+2.5×3.2,
=(6.8+3.2)×2.5,
=10×2.5,
=25;
(6)
| 7 |
| 4 |
| 5 |
| 8 |
| 1 |
| 4 |
| 8 |
| 5 |
=
| 7 |
| 4 |
| 5 |
| 8 |
| 1 |
| 4 |
| 5 |
| 8 |
=(
| 7 |
| 4 |
| 1 |
| 4 |
| 5 |
| 8 |
=
| 8 |
| 4 |
| 5 |
| 8 |
=
| 5 |
| 4 |
=1
| 1 |
| 4 |
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