问题
解答题
计算 ①(-
②-14-[-2+(1-0.2÷
|
答案
①原式=(-
+3 4
-5 12
)×(-60)7 6
=
×60-3 4
×60+5 12
×607 6
=45-25+70
=90;
②原式=-1-[-2+(1-
)×(-3)]1 3
=-1-(-2-
×3)2 3
=-1-(-2-2)
=-1-(-4)
=-1+4
=3.
计算 ①(-
②-14-[-2+(1-0.2÷
|
①原式=(-
+3 4
-5 12
)×(-60)7 6
=
×60-3 4
×60+5 12
×607 6
=45-25+70
=90;
②原式=-1-[-2+(1-
)×(-3)]1 3
=-1-(-2-
×3)2 3
=-1-(-2-2)
=-1-(-4)
=-1+4
=3.