Question

运用加法运算定律，使（8.28+2.69）+4.72运算简便的计算过程是

[     ]

A．（8.28+2.69）+4.72
    =（8.28+4.72）+2.69
    =13+2.69
    =15.69
B．（8.28+2.69）+4.72
     =8.28+2.69+4.72
     =10.97+4.72
     =15.69
C．（8.28+2.69）+4.72
     =2.69+8.28+4.72
     =2.69+13
     =15.69

Answer 1

A