Question

1．口算．

2.6×0.3=	6.3-3.6=	1.25×0.08	9.1+1.9
54÷0.9=	2.5×1.2=	1-0.1=	0.4×15=
8.5+5=	0.6×5.3×5=	102÷25=	8.4÷3÷0.7=

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2.5×1.2變形為2.5×4×0.3計算，0.6×5.3×5變形為0.6×5×5.3計算．

解答 解：

2.6×0.3=0.78	6.3-3.6=2.7	1.25×0.08=0.1	9.1+1.9=11
54÷0.9=60	2.5×1.2=3	1-0.1=0.9	0.4×15=6
8.5+5=13.5	0.6×5.3×5=15.9	102÷25=4	8.4÷3÷0.7=4

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