老师，帮我看一下这个题

同学，具体如下所示 1=1000000%2B800000-1100000=700000 2=530000%2B520000-650000=400000 3=580000 4=120000%2B100000-100000=120000 5=500000 6=5000000-3000000=2000000 7=2000000 8=70000 9=5000000 10=3000000 11=40000%2B800000%2B650000%2B350000%2B120000%2B2000000%2B1970000%2B5000000%2B3000000=13930000

16项%2B1000000%2B2项%2B2000000-480000=19项%2B120000%2B500000%2B1800000%2B280000-100000 19项%2B20项-350000=60000， 15项%2B700000%2B530000%2B2000000-580000=60000%2B100000%2B500000%2B1800000%2B280000-70000 15项=20000 16项=20000%2B30000-40000=10000 19项=330000 20项=80000 17项=10000%2B1000000%2B400000%2B2000000%2B100000=3510000 18项=480000%2B330000%2B120000%2B500000%2B1800000%2B280000=3510000 12项=13930000 14项=20000%2B700000%2B530000%2B2000000%2B70000=3320000 13项=580000%2B60000%2B100000%2B500000%2B1800000%2B280000=3320000