题目内容
| 用合适的方法计算. 35×12+350÷70 | 54.2-
|
| ||||||||||||||||||
0.7÷[(
| (
| (
|
(1)35×12+350÷70,
=420+5,
=425;
(2)54.2-
+4.8-
,
=(54.2+4.8)-(
+
),
=59-2,
=57;
(3)
÷
+
×
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(4)0.7÷[(
-
)×24]
=0.7÷[
×24-
×24],
=0.7÷[20-6],
=0.7÷14,
=0.05;
(5)(
+
)×4+
=
×4+
×4+
,
=
+
+1,
=1+1,
=2;
(6)(
+
)÷
+
=
×
+
,
=
+
,
=
.
=420+5,
=425;
(2)54.2-
| 2 |
| 9 |
| 16 |
| 9 |
=(54.2+4.8)-(
| 2 |
| 9 |
| 16 |
| 9 |
=59-2,
=57;
(3)
| 3 |
| 7 |
| 5 |
| 6 |
| 4 |
| 7 |
| 6 |
| 5 |
=
| 3 |
| 7 |
| 6 |
| 5 |
| 4 |
| 7 |
| 6 |
| 5 |
=(
| 3 |
| 7 |
| 3 |
| 7 |
| 6 |
| 5 |
=1×
| 6 |
| 5 |
=
| 6 |
| 5 |
(4)0.7÷[(
| 5 |
| 6 |
| 1 |
| 4 |
=0.7÷[
| 5 |
| 6 |
| 1 |
| 4 |
=0.7÷[20-6],
=0.7÷14,
=0.05;
(5)(
| 1 |
| 17 |
| 1 |
| 4 |
| 13 |
| 17 |
=
| 1 |
| 17 |
| 1 |
| 4 |
| 13 |
| 17 |
=
| 4 |
| 17 |
| 13 |
| 17 |
=1+1,
=2;
(6)(
| 4 |
| 5 |
| 1 |
| 4 |
| 7 |
| 3 |
| 7 |
| 10 |
=
| 21 |
| 20 |
| 3 |
| 7 |
| 7 |
| 10 |
=
| 9 |
| 20 |
| 7 |
| 10 |
=
| 23 |
| 20 |
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