①=
②=
③5×10%=
④2.51﹣1.9=
⑤3.14×32=
⑥=
⑦=
⑧=
⑨1+2.5=
⑩=
25%+10x=0.8
3.75:x=3:12 (x-0.6)× =2.25 25%: =x:
加法算式:
乘法算式: