5.3+17.13-(4.7+0.87)简便运算
简便计算:5.3+(17.13-4.7)+0.8718.917-(4.917+5.73)14.15-4.75+1.85-2.25....
简便计算:
5.3+(17.13-4.7)+0.87
18.917-(4.917+5.73)
14.15-4.75+1.85-2.25. 展开
5.3+(17.13-4.7)+0.87
18.917-(4.917+5.73)
14.15-4.75+1.85-2.25. 展开
1个回答
展开全部
(1)5.3+(17.13-4.7)+0.87
=5.3-4.7+17.13+0.87
=(5.3-4.7)+(17.13+0.87)
=0.6+18
=18.6;
(2)18.917-(4.917+5.73)
=18.917-4.917-5.73
=14-5.73
=8.27;
(3)14.15-4.75+1.85-2.25
=14.15+1.85-4.75-2.25
=(14.15+1.85)-(4.75+2.25)
=16-7
=9.
=5.3-4.7+17.13+0.87
=(5.3-4.7)+(17.13+0.87)
=0.6+18
=18.6;
(2)18.917-(4.917+5.73)
=18.917-4.917-5.73
=14-5.73
=8.27;
(3)14.15-4.75+1.85-2.25
=14.15+1.85-4.75-2.25
=(14.15+1.85)-(4.75+2.25)
=16-7
=9.
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