①985-499+108 =985-607 =378 ( ) 改正: ②620-(320+186) =300+186 =486 ( ) 改正:
950-372+190 250-87×2 (725-95)÷9
314-208+127 276+3×8
(243-208)÷5 724-(407+218)
300-184+273 257+(418-189)
207+185+441
865-377-239
157+649-370
750-(294+305)