问题 解答题
脱式计算.(能简算的要简算)
1305-386-614
1
4
+
2
3
-
5
6
)×12   
1.25×32×2.5  
10.9-(
4
5
+9.6÷4)
答案

(1)1305-386-614,

=1305-(386+614),

=1305-1000,

=305;

(2)(

1
4
+
2
3
-
5
6
)×12,

=

1
4
×12+
2
3
×12-
5
6
×12,

=3+8-10,

=1;

(3)1.25×32×2.5,

=(1.25×8)×(4×2.5),

=10×10,

=100;

(4)10.9-(

4
5
+9.6÷4),

=10.9-(

4
5
+2.4),

=10.9-3.2,

=7.7.

单项选择题
单项选择题