1) （50-20）－（30+20）+ 8 - 38
30 - 50 + 8 - 38
38 - 88
-50
2) 10－（5+5）+ 3 +（15+ 18）－6
10 - 10 + 3 + 33 -6
46 - 16
30
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Verified answer
1) （50-20）－（30+20）+ 8 - 38
30 - 50 + 8 - 38
38 - 88
-50
2) 10－（5+5）+ 3 +（15+ 18）－6
10 - 10 + 3 + 33 -6
46 - 16
30