
(1)1+(?23)?(+13)?(?14);(2)35×(13?12)÷54;(3)(16+112?14)×(?48);(4)?14?16×[2?(?3)2];
(1)1+(?23)?(+13)?(?14);(2)35×(13?12)÷54;(3)(16+112?14)×(?48);(4)?14?16×[2?(?3)2];(5)-...
(1)1+(?23)?(+13)?(?14);(2)35×(13?12)÷54;(3)(16+112?14)×(?48);(4)?14?16×[2?(?3)2];(5)-3-[-5-0.2÷45×(-2)2].
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(1)1+(?
)?(+
)?(?
);
=1-
?
+
=
;
(2)
×(
?
)÷
;
=(
?
)×
=?
;
(3)(
+
?
)×(?48),
=-8-4+12
=0;
(4)?14?
×[2?(?3)2],
=-1-
×(-7)
=
(5)-3-[-5-0.2÷
×(-2)2],
=-3-[-5-
×4]
=-3-(-6)
=3.
2 |
3 |
1 |
3 |
1 |
4 |
=1-
2 |
3 |
1 |
3 |
1 |
4 |
=
1 |
4 |
(2)
3 |
5 |
1 |
3 |
1 |
2 |
5 |
4 |
=(
1 |
5 |
3 |
10 |
4 |
5 |
=?
2 |
25 |
(3)(
1 |
6 |
1 |
12 |
1 |
4 |
=-8-4+12
=0;
(4)?14?
1 |
6 |
=-1-
1 |
6 |
=
1 |
6 |
(5)-3-[-5-0.2÷
4 |
5 |
=-3-[-5-
1 |
4 |
=-3-(-6)
=3.
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