问题
解答题
计算:①10
②(1
|
答案
①10
+(-33 5
)+(-85 6
)+(-23 5
),1 6
=10
-83 5
-33 5
-25 6
,1 6
=2-6,
=-4;
②(1
-24 5
+35 6
-47 10
)÷(-8 15
),1 30
=(
-9 5
+17 6
-37 10
)×(-30),68 15
=
×(-30)-9 5
×(-30)+17 6
×(-30)-37 10
×(-30),68 15
=-54+85-111+136,
=221-165,
=56.