989÷23
525÷55
801÷89
800÷34
780÷13×5 (326+81)÷37 360÷(246-228)×28
(900-16×35)÷34 32×18-540÷45 720÷[(187+18)÷41]
408×50= 125×8= 180×40=
39×201≈ 297×51≈ 198×71≈
①355÷52=
②492÷28=
③267÷85=
④361÷46=
⑤4600÷230=
⑥7100÷900=
①302×64=
②538×27=
③360×49=
④804÷67=
⑤552÷23=
⑥870÷29=
验算:
37037×12=,37037×=666666。
3.2÷0.01= 5.6+3.99= ÷ =
× = 4.1+1÷2=