Question

9．直接写出得数．

3.5×0.2=	10÷0.5=	6×0.25=	0.63÷0.9=
3.26+7.4=	0.02÷0.4=	0.12=	3×0.4÷3×0.4=
2.75-2.5=	36.36÷0.12=	12.87+1.3=	8÷0.25×4=
a-0.27a=	4.2b+1+4.8b=	1.25×0.8=	2.81-1.7+0.3=
0.99÷0.01=	1.2×4=	3.9×0.01=	2.33×1.2=

Answer 1

分析 根据小数加减乘除法运算的计算法则进行计算即可求解．注意3×0.4÷3×0.4变形为（3÷3）×（0.4×0.4）计算．

解答 解：

3.5×0.2=0.7	10÷0.5=20	6×0.25=1.5	0.63÷0.9=0.7
3.26+7.4=10.66	0.02÷0.4=0.05	0.12=0.01	3×0.4÷3×0.4=0.16
2.75-2.5=0.25	36.36÷0.12=303	12.87+1.3=14.17	8÷0.25×4=128
a-0.27a=0.73a	4.2b+1+4.8b=9b+1	1.25×0.8=1	2.81-1.7+0.3=1.41
0.99÷0.01=99	1.2×4=4.8	3.9×0.01=0.039	2.33×1.2=2.796

点评 考查了小数加减乘除法运算，关键是熟练掌握计算法则正确进行计算．