Question

10．口算

1.23÷3=	1.7×0.4=	0.36÷12=	1.6+0.38=	0.8×11=	1-0.75=
1.2÷0.3=	0.75×4=	15×0.4=	2.14-0.9=	4×0.25=	10÷2.5=
0.4×52=	1.6×0.4=	9.6÷6=	0.6÷0.5=	0.125×8=	0.38×1000=
0÷3.5×0.2=	0×9.7+2.3=	1.6×9+1.6=	3.8+1.2=	4.8÷0.3=	530+270=
0.51+1.7=	7.6÷3.8=	92÷2.3=	9.6-1.6=	7.2+2.8=	2.63+0.37=

Answer 1

分析 根据小数加减乘除法的计算方法进行解答即可．

解答 解：

1.23÷3=0.41	1.7×0.4=0.68	0.36÷12=0.03	1.6+0.38=1.98	0.8×11=8.8	1-0.75=0.25
1.2÷0.3=4	0.75×4=3	15×0.4=6	2.14-0.9=1.24	4×0.25=1	10÷2.5=4
0.4×52=20.8	1.6×0.4=0.64	9.6÷6=1.6	0.6÷0.5=1.2	0.125×8=1	0.38×1000=380
0÷3.5×0.2=0	0×9.7+2.3=2.3	1.6×9+1.6=16	3.8+1.2=5	4.8÷0.3=16	530+270=800
0.51+1.7=2.21	7.6÷3.8=2	92÷2.3=40	9.6-1.6=8	7.2+2.8=10	2.63+0.37=3

点评 此题考查了小数加减乘除法的口算能力．