Question

三点七乘零点五八加零三七乘四点二的简便计算怎么写

三点七乘零点五八加零三七乘四点二的简便计算怎么写

Answer 1

3.7*0.58+0.37*4.2
=3.7*0.58+0.37*10*4.2/10
=3.7*0.58+3.7*0.42
=3.7*(0.58+0.42)
=3.7*1
=3.7

Answer 2

3.7x0.58+0.37x4.2
=3.7x0.58+3.7x0.42
=3.7x(0.58+0.42)
=3.7x1
=3.7.