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递等式计算(怎样计算简便就怎样算)8.68+5.76+1.3219-9.09+1.9118.72+1.52-3.7260-(3.7+0.75+8.6)4.64+5.78+1.36+5.223.64-1.28-1.72.

题目详情
递等式计算(怎样计算简便就怎样算)
8.68+5.76+1.32            19-9.09+1.91             18.72+1.52-3.72
60-(3.7+0.75+8.6)4.64+5.78+1.36+5.223.64-1.28-1.72.
▼优质解答
答案和解析
(1)8.68+5.76+1.32
=8.68+1.32+5.76
=10+5.76
=15.76;

(2)19-9.09+1.91
=9.91+1.91
=11.82;

(3)18.72+1.52-3.72
=18.72-3.72+1.52
=15+1.52
=16.52;

(4)60-(3.7+0.75+8.6)
=60-(4.45+8.6)
=60-13.05
=46.95;

(5)4.64+5.78+1.36+5.22
=(4.64+1.36)+(5.78+5.22)
=6+11
=17;

(6)3.64-1.28-1.72
=3.64-(1.28+1.72)
=3.64-3
=0.64.