-0.5=
15×=
4÷=
90×80%=
1-23%=
〇 〇 〇
〇5 〇 〇
×0=
=
×12=
×100=
18×=
×3=
=
= = ×0= =
×12= = 45×= ×=
30-16.8= 0.3÷15%= 0.23=0 0÷28.3=
726-286= 25.3+51.57= 7÷35%= 5-2.9=
+ = 625× = 0.375÷ = × =