Question

2．直接寫得數(shù)．

1.25×0.8=	2.4÷24=	2.3+4.7=	0.63÷0.9=
0.25×6=	0.5÷0.25=	0.39÷0.03=	0.4×0.8=
1-0.13=	5.06÷10=	4.8-3=	0.13×1000=
1.9+2.4+7.6=	2.5×0.4÷2.5×0.4=	5.6-5.6+7=	2.8÷（3.74-3.73）=

Answer 1

分析 根據(jù)小數(shù)加減乘除法運算的計算法則計算即可求解．注意1.9+2.4+7.6根據(jù)加法結(jié)合律計算，2.5×0.4÷2.5×0.4變形為（2.5÷2.5）×（0.4×0.4）計算．

解答 解：

1.25×0.8=1	2.4÷24=0.1	2.3+4.7=7	0.63÷0.9=0.7
0.25×6=1.5	0.5÷0.25=2	0.39÷0.03=13	0.4×0.8=0.32
1-0.13=0.87	5.06÷10=0.506	4.8-3=1.8	0.13×1000=130
1.9+2.4+7.6=11.9	2.5×0.4÷2.5×0.4=0.16	5.6-5.6+7=7	2.8÷（3.74-3.73）=280

點評 考查了小數(shù)加減乘除法運算，關(guān)鍵是熟練掌握計算法則正確進行計算．