细心算一算(1)(+2)-(-6)(2)|-3|×(-34)÷(-14)(3)(12?56?35)×30(4)18-[6?(?2)×(?12)]
细心算一算(1)(+2)-(-6)(2)|-3|×(-34)÷(-14)(3)(12?56?35)×30(4)18-[6?(?2)×(?12)](5)?2123+(+31...
细心算一算(1)(+2)-(-6)(2)|-3|×(-34)÷(-14)(3)(12?56?35)×30(4)18-[6?(?2)×(?12)](5)?2123+(+314)?(?23)?(+14)(6)(59?76)×(?18)?16×(29?718).
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(1)(+2)-(-6)=8;
(2)|-3|×(-
)÷(-
)
=3×
×4
=9;
(3)(
?
?
)×30
=
×30-
×30-
×30
=15-25-18
=-28;
(4)18-[6?(?2)×(?
)]
=18-[6-1]
=18-5
=13;
(5)?21
+(+3
)?(?
)?(+
)
=-21
+
+3
-
=-21+3
=-18;
(6)(
?
)×(?18)?16×(
?
)
=-
×(-18)-16×(-
)
=11+2
=13
.
(2)|-3|×(-
3 |
4 |
1 |
4 |
=3×
3 |
4 |
=9;
(3)(
1 |
2 |
5 |
6 |
3 |
5 |
=
1 |
2 |
5 |
6 |
3 |
5 |
=15-25-18
=-28;
(4)18-[6?(?2)×(?
1 |
2 |
=18-[6-1]
=18-5
=13;
(5)?21
2 |
3 |
1 |
4 |
2 |
3 |
1 |
4 |
=-21
2 |
3 |
2 |
3 |
1 |
4 |
1 |
4 |
=-21+3
=-18;
(6)(
5 |
9 |
7 |
6 |
2 |
9 |
7 |
18 |
=-
11 |
18 |
1 |
6 |
=11+2
2 |
3 |
=13
2 |
3 |
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