简便计算128×78+256×11 45×2516+23×34 13713-(14+3713)-0.75.

简便计算128×78+256×11 45×2516+23×34 13713-(14+3713)-0.75.
2025-03-05 05:24:31
推荐回答(1个)
回答1:

(1)128×78+256×11
=128×78+128×(2×11)
=128×78+128×22
=128×(78+22)
=128×100
=12800;

(2)
4
5
×
25
16
+
2
3
×
3
4
 
=
5
4
+
1
2

=
7
4


(3)13
7
13
-(
1
4
+3
7
13
)-0.75
=13
7
13
-3
7
13
-
1
4
-
3
4

=10-1
=9