Question

計(jì)算我最棒． 0.4×0.8=	0.4×0.4=	4.2×10=
0.07×0.8=	9.2×0.01=	0.83×100=
0.5×0.02=	10.12×0.2=

Answer 1

分析：本題根據(jù)小數(shù)乘法的運(yùn)算法則計(jì)算即可．

解答：

解：0.4×0.8=0.32，	0.4×0.4=0.16，	4.2×10=42，
0.07×0.8=0.056，	9.2×0.01=0.092	0.83×100=83，
0.5×0.02=0.01，	10.12×0.2=2.024．

點(diǎn)評(píng)：在完成小數(shù)乘法時(shí)，要注意小數(shù)點(diǎn)位置的變化．