0.6+1.2= 0.8-0.06 = 2+1.8= 1-0.09=
4.5+5= 6+0.04= 18.5-5= 7.77-7.7=
45+2.5 = 3.33-2.22=
5.2-3.9=
128÷1000=
8.99-4.27=
10-2.8-2.2=
0÷93=
3.6+2.46=
0.52×1000=
24×25×4=
被调查学生对端午节文化习俗了解情况统计图