计算下面各题.怎样简便就怎样计算.(1)275+450÷18×25(2)5×13×35×310(3)31×101(4)12×(34

2024-12-27 19:26:23
推荐回答(1个)
回答1:

(1)275+450÷18×25               
=275+25×25
=275+625
=900;

(2)5×

1
3
×
3
5
×
3
10

=
5
3
×
3
5
×
3
10

=
3
10


(3)31×101  
=31×100+31×1
=3100+31
=3131;

(4)12×(
3
4
+
1
6
-
1
3

=12×
3
4
+12×
1
6
-12×
1
3

=9+2-4
=11-4
=7.