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简便计算.9.6+1.8-1.60.21+3.48+0.89+2.5215.3-(0.91+2.3)

题目详情
简便计算.
9.6+1.8-1.6
0.21+3.48+0.89+2.52
15.3-(0.91+2.3)
▼优质解答
答案和解析
(1)9.6+1.8-1.6,
=(9.6-1.6)+1.8,
=8+1.8,
=9.8;

(2)0.21+3.48+0.89+2.52,
=(0.21+0.89)+(3.48+2.52),
=1.1+6,
=7.1;

(3)15.3-(0.91+2.3),
=15.3-0.91-2.3,
=(15.3-2.3)-0.91,
=13-0.91,
=12.09.