计算:(1)-22+3×(-1)2010-|-4|×5;(2)?3?[?5+(1?2×35)÷(?2)];(3)?52×34+25×12?25×14;(

2025-03-11 02:52:59
推荐回答(1个)
回答1:

(1)-22+3×(-1)2010-|-4|×5
=-4+3×1-4×5
=-4+3-20
=-21;

(2)?3?[?5+(1?2×
3
5
)÷(?2)]

=-3-[-5+(1-
6
5
)÷(-2)]
=-3-[-5+(-
1
5
)÷(-2)]
=-3-[-5+
1
10
]
=-3+4
9
10

=1
9
10


(3)?52×
3
4
+25×
1
2
?25×
1
4

=-25×
3
4
+25×
1
2
-25×
1
4

=25×(-
3
4
+
1
2
-
1
4

=25×(-
1
2

=-12.5;

(4)4
2
3
+2
1
5
?0.8+2
4
5
?(?6
1
3
)

=(4
2
3
+6
1
3
)+(2
1
5
+2
4
5
)-0.8
=11+5-0.8
=15.2.