Question

5．直接寫出得數(shù)

1-0.25=	9.4+1.7=	10-0.8=	5.6+2.6=
90.7-6=	5.97×34.3=	0.4×3=	3.26+100=
9.9×8.8=	0.25×40=	34×9.2=	12-10.09=
4.7×0.9=	0.9-0.56=	2.7×7.2=	3.78+1.22=

Answer 1

分析 運(yùn)用小數(shù)的加減、乘除法的計(jì)算法則進(jìn)行計(jì)算即可．注意小數(shù)點(diǎn)位置的變化．

解答

解：1-0.25=0.75	9.4+1.7=11.1	10-0.8=9.2	5.6+2.6=8.2
90.7-6=84.7	5.97×34.3=204.771	0.4×3=1.2	3.26+100=103.26
9.9×8.8=87.12	0.25×40=10	34×9.2=312.8	12-10.09=1.91
4.7×0.9=4.23	0.9-0.56=0.34	2.7×7.2=19.44	3.78+1.22=5

點(diǎn)評 本題考查了小數(shù)的加減乘除法的計(jì)算法則，計(jì)算小數(shù)的加減，注意小數(shù)點(diǎn)要對齊，注意計(jì)算結(jié)果中小數(shù)部分的位數(shù)．