【题目】我能算得又对又快。
41+20 = 7+65 = 68-5 = 79-( )=70
78-50+30 = 83-7 = 6+8 = 16-9 =
( )+9=13 65-60+ 80 = 96-6= 50+38 =
54-40 = 40+( )=46 58+5+30 = 29+40 =
45-8 = 0+60 = ( )-5=30 32+ 50-40 =
【答案】61 72 63 9
58 76 14 7
4 85 90 88
14 6 93 69
37 60 35 42
【解析】
略