80
40= 800
400= 8000
4000=

|
0.63×2.24= |
91.4÷9.7= |
6.78÷0.996.78 9.6×1.010.96×10.1
5.2÷1.15.2×1.1
3.75×1.13.75 0.81×10.81
4.69×0.994.69 1.54×0.723.75×1.54
37.64×136= 3.764×13.6=
37.64×0.0136= 0.3764×13600=
①0.72×5 =
②2.4×0.8 =
③0.56×0.04 =
④19.4÷12≈(得数保留两位小数)
⑤400÷75 =(用循环小数表示结果)
756×0.9756
1×0.941
4.25×1.14.25
15÷1.515
60×0.04= 0.27÷0.3= 5÷8= 0.56÷0.7=
0.34×0.5= 8.5÷0.01= 0.98+0.9= 0.08×1.25=

×
×
×
5×
5× 
×0
×
+
×
×(1+
)
25×24= 910﹣570= 6.3÷0.9=
+
=
+
=
÷0.1=

36×0.8936 9.83÷4.59.83 0.46×1546×0.15
5.2÷0.25.2 7.26÷17.26×1 2.1×0.90.9
360.5=72 360.5=18 362.5=14.4
4.83÷0.07=÷7
1.96÷0.8=÷8