问题补充说明:(20)+30_____-40_____+60_____-50_____+80_____.
50 10 70 20 100
20+30=50,50-40=10,
10+6来自0=70,
70-50=20,
20+80=100.
故答案为:50,10,70,20,100.
问题补充说明:(20)+30_____-40_____+60_____-50_____+80_____.
50 10 70 20 100
20+30=50,50-40=10,
10+6来自0=70,
70-50=20,
20+80=100.
故答案为:50,10,70,20,100.
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