660÷10=
35×2=
35×20=
35×200=
450-100=
100÷4=
40×3=
600×50=
185+25=
342-99=
7.4+2.6= 40÷80= 10-0.95= 2.5×16= 6.3÷0.3=
202-98= 6- = 60×40% =