①60÷20=3②6÷2=3 ③600÷20=30④6000÷2000= 3
①346×15=
②48×210=
③★598÷29=
④784÷28=
①54×98
②(+﹣)×24
③4.86×[1÷(2.1﹣2.09)]
④8﹣