Question

4．口算

9.7+1.1=	7.2÷1.2=	2.85×0.1=	1.8×0.6=
1.4×0.4=	2.5×80=	0.12+8.8=	6.3-4.7=
0.3×0.3=	3.24÷0.06=	0.25×0.4=	1-0.19=
16×0.25=	98.4÷100=	0.64÷0.08=	2.6÷0.02=

Answer 1

分析 根據小數加減乘除法運算的計算法則計算即可求解．

解答 解：

9.7+1.1=10.8	7.2÷1.2=6	2.85×0.1=0.285	1.8×0.6=1.08
1.4×0.4=0.56	2.5×80=200	0.12+8.8=8.92	6.3-4.7=1.6
0.3×0.3=0.09	3.24÷0.06=54	0.25×0.4=0.1	1-0.19=0.81
16×0.25=4	98.4÷100=0.984	0.64÷0.08=8	2.6÷0.02=130

點評 考查了小數加減乘除法運算，關鍵是熟練掌握計算法則正確進行計算．