计算(1)-20+(-14)-(-18)-13(2)42×(-23)+(-34)÷(-0.25)(3)-123×(0.5-23)÷119(4)(212-16+14)×(-24)(5)-1101-[-3×(2÷3)2-43÷22].-数学
题文
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×(-
=-28+3 =-25; (3)-1
=-
=
=
(4)(2
=-2
=-60+4-6 =-62; (5)-1101-[-3×( 2÷3 )2-
=-1-[-3×
|