分析:本题根据整数,小数,分数的加法、减法、乘法、除法的计算法则计算即可.25×12可将12拆分为4×3进行计算;
6
7
×2÷
6
7
×2可以根据乘法交换律进行简便计算.解答:解:
4800÷240=20;
25×12=300;
16.5÷10%=165;
3
4
+
5
12
=
7
6
;
1-
7
12
+
5
12
=
5
6
;
1.02-0.43=0.59;
14÷
2
7
=49;
0.32=0.09;
8
9
×
3
4
=
2
3
;
6
7
×2÷
6
7
×2=4.故答案为:20,300,165,
7
6
,
5
6
,0.59,49,0.09,
2
3
,4.
点评:完成本题要注意1-
7
12
+
5
12
不适用加法结合律.