Question

12．直接寫出得數(shù)．

1.2×0.6=	0.18×5=	2.8÷0.07=	1÷4=
0.5×0.1÷0.5×0.1=	6.2÷0.62=	1.7×0.3=	1.4÷10=
3.6×0.4=	4.2÷0.7÷0.6=	0.45÷3=	0.68+0.3=
3.4÷0.17=	10-0.125×8=	3.8-3.8÷19=

Answer 1

分析 此題考查小數(shù)四則混合運算順序，先算乘除再算加減，其中0.5×0.1÷0.5×0.1可用乘法交換和結(jié)合律簡算，4.2÷0.7÷0.6=10根據(jù)除法的性質(zhì)簡算．

解答 解：

1.2×0.6=0.72	0.18×5=0.9	2.8÷0.07=40	1÷4=0.25
0.5×0.1÷0.5×0.1=0.01	6.2÷0.62=10	1.7×0.3=0.51	1.4÷10=0.14
3.6×0.4=1.44	4.2÷0.7÷0.6=10	0.45÷3=0.15	0.68+0.3=0.98
3.4÷0.17=20	10-0.125×8=9	3.8-3.8÷19=3.6

點評 此題考查小數(shù)四則混合運算順序，分析數(shù)據(jù)找到正確的計算方法．