计算,能简算的要简算.710÷13+1213×710(34+14÷310)×12(58+37.5%)÷(2110?209%)79÷[(13+1
计算,能简算的要简算.710÷13+1213×710(34+14÷310)×12(58+37.5%)÷(2110?209%)79÷[(13+14)×4]....
计算,能简算的要简算.710÷13+1213×710(34+14÷310)×12(58+37.5%)÷(2110?209%)79÷[(13+14)×4].
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(1)
÷13+
×
,
=
×
+
×
,
=
×(
+
),
=
×1,
=
;
(2)(
+
÷
)×12,
=(
+
×
)×12,
=(
+
)×12,
=
×12+
×12,
=9+10,
=19;
(3)(
+37.5%)÷(
-209%),
=(0.625+0.375)÷(2.1-2.09),
=1÷0.01,
=100;
(4)
÷[(
+
)×4],
=
÷[
×4],
=
÷
,
=
×
,
=
.
7 |
10 |
12 |
13 |
7 |
10 |
=
7 |
10 |
1 |
13 |
12 |
13 |
7 |
10 |
=
7 |
10 |
1 |
13 |
12 |
13 |
=
7 |
10 |
=
7 |
10 |
(2)(
3 |
4 |
1 |
4 |
3 |
10 |
=(
3 |
4 |
1 |
4 |
10 |
3 |
=(
3 |
4 |
5 |
6 |
=
3 |
4 |
5 |
6 |
=9+10,
=19;
(3)(
5 |
8 |
21 |
10 |
=(0.625+0.375)÷(2.1-2.09),
=1÷0.01,
=100;
(4)
7 |
9 |
1 |
3 |
1 |
4 |
=
7 |
9 |
7 |
12 |
=
7 |
9 |
7 |
3 |
=
7 |
9 |
3 |
7 |
=
1 |
3 |
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