题目内容
【题目】怎样算简便就怎样算。
68+11.2+9.8 0.35+1.48+0.65+0.52
6.65+0.82+0.18+2.35 13.56-(9.8+2.56)
【答案】89 3 10 1.2
【解析】
68+11.2+9.8
=68+(11.2+9.8)
=68+21
=89
0.35+1.48+0.65+0.52
=(0.35+0.65)+(1.48+0.52)
=1+2
=3
6.65+0.82+0.18+2.35
=(6.65+2.35)+(0.82+0.18)
=9+1
=10
13.56-(9.8+2.56)
=13.56-2.56-9.8
=11-9.8
=1.2
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