89 370 10.1×37
7.3﹣3= 2.5×0.4= 3÷20%= 198+54= 1200÷25÷8=
﹣= 18×= 1+﹣= ÷3= 1÷÷3×=
①14.56﹣6.62+5.44﹣8.38
②×0.8×12.5
③5.9×63+59×3.7
④÷[×(﹣)]