
计算(1)-20+(-14)-(-18)-13(2)?81÷(?214)×49÷(?16)(3)?32+(?2?5)÷7?|?14|×(?2)4(4)(29?
计算(1)-20+(-14)-(-18)-13(2)?81÷(?214)×49÷(?16)(3)?32+(?2?5)÷7?|?14|×(?2)4(4)(29?14+118...
计算(1)-20+(-14)-(-18)-13(2)?81÷(?214)×49÷(?16)(3)?32+(?2?5)÷7?|?14|×(?2)4(4)(29?14+118)÷(?136).
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(1)-20+(-14)-(-18)-13
=-20-14+18-13
=-29;
(2)?81÷(?2
)×
÷(?16)
=-81×
×
×
=-1;
(3)?32+(?2?5)÷7?|?
|×(?2)4
=-9-7÷7-
×16
=-9-1-4
=-14;
(4)(
?
+
)÷(?
)
=(
-
+
)×(-36)
=-
×36+
×36-
×36
=-8+9-2
=-1.
=-20-14+18-13
=-29;
(2)?81÷(?2
1 |
4 |
4 |
9 |
=-81×
4 |
9 |
4 |
9 |
1 |
16 |
=-1;
(3)?32+(?2?5)÷7?|?
1 |
4 |
=-9-7÷7-
1 |
4 |
=-9-1-4
=-14;
(4)(
2 |
9 |
1 |
4 |
1 |
18 |
1 |
36 |
=(
2 |
9 |
1 |
4 |
1 |
18 |
=-
2 |
9 |
1 |
4 |
1 |
18 |
=-8+9-2
=-1.
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