355+445=
+ =
3.14÷0.1=
52+32=
× ×0=
× =
5 ÷5.25=
× + × =
+ + =
①( + )×54
②8.5×4.68+1.5×4.68
③ × + ×
④125×32×25
①1.9x﹣1.7x=80.4
② =
③5.6x﹣ x=4.8
④5x+ =