900×30=
50×12=
107×4=
32×80=
24×50=
180×7=
132×3=
980×0=
①25×28-320÷8
②34×(15+35÷5)
③864÷[(46-38)×6]
①14.56﹣6.62+5.44﹣8.38
②×0.8×12.5
③5.9×63+59×3.7
④÷[×(﹣)]