Question

口算． 0.8×7=	8×0.6=	70×0.12=	0.25×8=
0.45×3=	2.4×0.2=	0.125×8=	3×0.2×4=
2.5×4=	8×0.09=	0.5×4=	0.5×0.3=
0.7×0.7=	8×1.25=	2.4×5=	1.2×0.6=
1.6×0.4=	18×0.3=	3.7×0.2=	5.6×2=

Answer 1

考點(diǎn)：小數(shù)乘法

專題：計(jì)算題

分析：根據(jù)小數(shù)乘以小數(shù)的計(jì)算方法進(jìn)行計(jì)算即可．

解答： 解：

0.8×7=5.6	8×0.6=4.8	70×0.12=8.4	0.25×8=2
0.45×3=1.35	2.4×0.2=0.48	0.125×8=1	3×0.2×4=2.4
2.5×4=10	8×0.09=0.72	0.5×4=2	0.5×0.3=0.15
0.7×0.7=0.49	8×1.25=10	2.4×5=12	1.2×0.6=0.72
1.6×0.4=0.64	18×0.3=5.4	3.7×0.2=0.74	5.6×2=11.2

點(diǎn)評(píng)：本題考查的是小數(shù)乘以小數(shù)的計(jì)算方法，掌握正確的計(jì)算方法，再根據(jù)題意靈活的進(jìn)行計(jì)算．