1 2 .
1 3 .
10 8 .
7+7= 34+5= 41+9= 75-30= 10+(99-9)=
18-6= 20-3= 28+6= 53-40= 56-5-10=
50+4= 73+8= 35+9= 6+17= 77-(7+2)=
11-8= 90-30= 84-80= 50-50= 59-30+4=
4人有几只手?
8只手上共有几根手指?
口诀:
①367+33=
②9﹣5.2=
③0.6×0.2=
④﹣=
⑤÷=