3+57+16=
90-25-26=
489-69= 50×8= 9 × 600=
380-40= 400×4= 39+160=
+ = - = 1- =
①25×8=
②109×3=
③320×4=
④62÷2=
⑤★94÷3=
⑥★484÷4=