简便运算0.370.37+20.630.37+0.630.63

分类: 作业答案 • 2023-01-12 19:27:07

问题描述：

简便运算0.37*0.37+2*0.63*0.37+0.63*0.63

答

0.37*0.37+2*0.63*0.37+0.63*0.63
=(0.37*0.37+0.63*0.37)+(0.63*0.37+0.63*0.63)
=0.37*(0.37+0.63)+0.63*(0.37+0.63)
=0.37*1+0.63*1
=1

简便运算0.37*0.37+2*0.63*0.37+0.63*0.63