一、直接写得数
52+25= 63+9= 72-50= 82-6= 16+8+20=
100-8= 90-20= 96-24= 25+11= 95-8-21=
6+49= 52-4= 4+26＝ 45+25= 58-28-16=
35-18= 55+29= 63-37= 12+53= 34+16-20=
8+88= 90-25= 33-9= 75+6= 69-15+8=
60-40= 96-90= 57-21= 46+26＝ 40+38-14=
二、竖式计算
42-20-8= 95-60-7= 25+37+28= 73-37+23=
51-30+29= 62-24-18= 93-27-45= 28+57-45=