1. 直接写出得数。

40+9 =        10 +30 =       59 – 7 =       85 – 80 =

60+40 =       26 +10 =       88 – 8 =       50 +26 =

72 + 27 =      38 – 27 =      54 +25 =       73 – 23 =

100 – 30 =     38 – 35 =      60 + 15 =       16 + 40 =