70+30= 60-6= 47+7= 8+30= 36-2=
31-8= 32+30= 5+85= 29-8= 36+8=
53-0+20= 36+8+4= 75-(14+6)= 100-(90-50)=
89+392 | 4×623 | 475×6 |
25>18+ -6<55 72>46+
57->30 56>29+ 32<64-


-53=18
53+18=
7×4=
6×4=
6×2=
4×8=
75厘米1米 54厘米45厘米 3米30厘米
100cm1m 5米5厘米5米50厘米 18cm1m
36=18 84=4 33=6