①x+=
②2x÷1.5 = 6
③5.6x-3.2x=30
④5x- =
G71 G3474 G401 Z161 G1536
①14.56﹣6.62+5.44﹣8.38
②×0.8×12.5
③5.9×63+59×3.7
④÷[×(﹣)]