问题
解答题
计算 (1)-20+(-14)-(-18)-13 (2)42×(-
(3)-1
(4)(2
(5)-1101-[-3×( 2÷3 )2-
|
答案
(1)-20+(-14)-(-18)-13
=-20-14+18-13
=-47+18
=-29;
(2)42×(-
)+(-2 3
)÷(-0.25)3 4
=-28+3
=-25;
(3)-1
×(0.5-2 3
)÷12 3 1 9
=-
×(-5 3
)÷11 6 1 9
=
÷15 18 1 9
=
;1 4
(4)(2
-1 2
+1 6
)×(-24)1 4
=-2
×24+1 2
×24-1 6
×241 4
=-60+4-6
=-62;
(5)-1101-[-3×( 2÷3 )2-
÷22]4 3
=-1-[-3×
-4 9
÷4]4 3
=-1-[-
-4 3
]1 3
=-1+5 3
=
.2 3