597≈ 7898≈ 624≈ 3065≈
( )
答:
78+12-48 71-(32-19) 3+24÷3
12+12÷4 48-8÷8 52-19+10
4+3= 6+9= 15-8=
24+3= 56+9= 65-8=
324+3= 256+9= 165-8=
724+3= 456+9= 465-8=
924+3= 856+9= 965-8=