75×14+630÷35 650÷13×9+560
(62×15-80)÷17 (420-76)×(23+57)
243÷[729÷(17-8)] [385-(37+53)]÷5
①6.07-4.5+0.98
②29×(65-560÷16)
③1500÷25×4
④37.61-(7.61+1.25)
⑤99×23+23
⑥1428÷[(103-89)×6]
①3.8×2.4+76× 0.38
②12× (15.4-9.6)
③3x-21= 24
① []
②4.6+7.68﹣1+2.32
③1.25×2.5×0.4×8
④9.5×20%+