题目内容
计算
(1)-20+(-14)-(-18)-13
(2)1-
+
-
+
(3)2
×(-36)(用简便方法计算)
(4))10+(-2)2×(-5)
(5)(-25)÷
×
÷(-16)
(6)(-24)×(
-
+
)
(1)-20+(-14)-(-18)-13
(2)1-
4 |
7 |
1 |
5 |
3 |
7 |
9 |
5 |
(3)2
8 |
9 |
(4))10+(-2)2×(-5)
(5)(-25)÷
5 |
4 |
4 |
5 |
(6)(-24)×(
1 |
6 |
1 |
4 |
1 |
2 |
(1)-20+(-14)-(-18)-13
=-20-14+18-13
=-29;
(2)1-
+
-
+
=1-(
+
)+(
+
)
=1-1+2
=2;
(3)2
×(-36)
=(3-
)×(-36)
=3×(-36)-
×(-36)
=-108+4
=-104;
(4))10+(-2)2×(-5)
=10+4×(-5)
=10-20
=-10;
(5)(-25)÷
×
÷(-16)
=25×
×
×
=1;
(6)(-24)×(
-
+
)
=-24×
+24×
-24×
=-4+6-12
=-10.
=-20-14+18-13
=-29;
(2)1-
4 |
7 |
1 |
5 |
3 |
7 |
9 |
5 |
=1-(
4 |
7 |
3 |
7 |
1 |
5 |
9 |
5 |
=1-1+2
=2;
(3)2
8 |
9 |
=(3-
1 |
9 |
=3×(-36)-
1 |
9 |
=-108+4
=-104;
(4))10+(-2)2×(-5)
=10+4×(-5)
=10-20
=-10;
(5)(-25)÷
5 |
4 |
4 |
5 |
=25×
4 |
5 |
4 |
5 |
1 |
16 |
=1;
(6)(-24)×(
1 |
6 |
1 |
4 |
1 |
2 |
=-24×
1 |
6 |
1 |
4 |
1 |
2 |
=-4+6-12
=-10.
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