①25×48
②19+136+281
③4×67×25
④43×201
⑤47×99+47
⑥630÷9÷7
⑦83×75-83×65
⑧489-175-25
⑨72×26+26×48
①20×(624÷52)
②26×20+96÷6
③484÷(32+12)×9
④12×[288÷(36-24)]
①
②36×()
③
④
⑤3.24×0.76+3.24×0.24
⑥
①0.25×16.2×4
②375+450÷18×25
③35.6- +34.4-
④ × + ÷
⑤[( - )× ]÷
⑥3.5× +5.5×80%+0.8