四、口算:
35+6+40= 47+9-20= 75-50+14=
49-9-30= 99-20+6= 100-30-7=
五、在○里填上">""<"或"=".
43+7+16○65 54-(24-14)○44
36+40-35○32 75-(85-25)○20
27+(50-5)○70 67-60+9○16
84-(18+29)○37 82-(9-9)○80
六.计算下面各题.
(1)85-39-28= (2)62-35+29=
(3)56-12-17= (4)35+(64-39)
(5)54+20+16= ( 6)7+59+20=
(7)82-(29+36)= (8)48+(46-27)