题目内容
计算:
(1)(-12)-5+(-14)-(-39);
(2)3
-(-
)+2
+(-
);
(3)(-81)÷2
-
÷(-16);
(4)(
-
-
+
)×48;
(5)25×
-(-25)×
+25×(-
);
(6)-32÷(-3)2+3×(-2);
(7)-16-(
-1)×(-
)(2-23);
(8)[1
-(
+
-
)×(-4)3]÷5.
(1)(-12)-5+(-14)-(-39);
(2)3
| 1 |
| 2 |
| 1 |
| 3 |
| 2 |
| 3 |
| 1 |
| 2 |
(3)(-81)÷2
| 1 |
| 4 |
| 4 |
| 9 |
(4)(
| 2 |
| 3 |
| 1 |
| 4 |
| 3 |
| 8 |
| 5 |
| 24 |
(5)25×
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
(6)-32÷(-3)2+3×(-2);
(7)-16-(
| 1 |
| 2 |
| 1 |
| 3 |
(8)[1
| 21 |
| 24 |
| 3 |
| 8 |
| 1 |
| 16 |
| 3 |
| 4 |
(1)原式=-12-5-14+39=8;
(2)原式=(3
-
)+(
+2
)=3+3=6;
(3)原式=-81×
-
×(-
)=-36+
=-35
;
(4)原式=32-12-18+10=12;
(5)原式=25×(
+
-
)=25;
(6)原式=-9÷9+(-6)=-7;
(7)原式=-1-(-
)×(-
)×(-6)=-1+1=0;
(8)原式=[
-(
+
-
)×(-64)]×
=[
-(-24-4+48)]×
=(
-20)×
=
-4=-3
.
(2)原式=(3
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 2 |
| 3 |
(3)原式=-81×
| 4 |
| 9 |
| 4 |
| 9 |
| 1 |
| 16 |
| 1 |
| 36 |
| 35 |
| 36 |
(4)原式=32-12-18+10=12;
(5)原式=25×(
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
(6)原式=-9÷9+(-6)=-7;
(7)原式=-1-(-
| 1 |
| 2 |
| 1 |
| 3 |
(8)原式=[
| 45 |
| 24 |
| 3 |
| 8 |
| 1 |
| 16 |
| 3 |
| 4 |
| 1 |
| 5 |
=[
| 45 |
| 24 |
| 1 |
| 5 |
| 45 |
| 24 |
| 1 |
| 5 |
| 9 |
| 24 |
| 15 |
| 24 |
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