Question

1.23÷3=	0.8×11=	1-0.75=
1.7×0.4=	0.36÷12=	1.6+0.38=
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=
4.3-0.4=	7-6.2=	0.86-0.3=
8.8÷2.2=	2.6÷0.2=	0.15×3=
0.9÷0.45=	0.27÷3=	0.51+1.7=
0.6÷0.5=	0.125×8=	0.38×1000=
6.8-1.7=	2.4×0.2=	32.8+19=
0.56÷14=	1÷0.05=	6÷12=
0.14×5=	3×1.4=	4.9÷0.7=
0.4÷8=	6.3+3.7=	3.5×0.2=
0.2×12.6×5=	8.4÷4.2=	2.4×0.5=
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=
7.6÷3.8=	92÷2.3=	9.6-1.6=
7.2+2.8=	2.63+0.37=	0.67+1.24=
0.3×101=	0.25×8=	16÷1.6=
26.1-3.5-7.5=

Answer 1

解：

1.23÷3=0.41	0.8×11=8.8	1-0.75=0.25
1.7×0.4=0.68	0.36÷12=0.03	1.6+0.38=1.98
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
4.3-0.4=3.9	7-6.2=0.8	0.86-0.3=0.56
8.8÷2.2=4	2.6÷0.2=13	0.15×3=0.45
0.9÷0.45=2	0.27÷3=0.09	0.51+1.7=2.21
0.6÷0.5=1.2	0.125×8=1	0.38×1000=380
6.8-1.7=5.1	2.4×0.2=0.48	32.8+19=51.8
0.56÷14=0.04	1÷0.05=20	6÷12=0.5
0.14×5=0.7	3×1.4=4.2	4.9÷0.7=7
0.4÷8=0.5	6.3+3.7=10	3.5×0.2=0.7
0.2×12.6×5=12.6	8.4÷4.2=2	2.4×0.5=1.2
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
7.6÷3.8=2	92÷2.3=40	9.6-1.6=8
7.2+2.8=10	2.63+0.37=3	0.67+1.24=1.91
0.3×101=30.3	0.25×8=2	16÷1.6=10
26.1-3.5-7.5=15.1

分析：根據小數的加減乘除及四則混合運算進行計算即可．
點評：口算題目，要求快速準確，能用簡便方法的要用簡便方法．