Question

50-15.37-14.63的简便计算

简便计算．
15.37+29.86+14.63
4.6×7.9+4.6×2.1
10-4.7-5.3．

Answer 1

①15.37+29.86+14.63
=（15.37+14.63）+29.86
=30+29.86
=59.86

②4.6×7.9+4.6×2.1
=4.6×（7.9+2.1）
=4.6×10
=46

③10-4.7-5.3
=10-（4.7+5.3）
=10-10
=0