65×99
362-(172-128)
25×15+75×25+250
56×[(31+329)÷9]
47.4-16.4+22.6-13.6
4×32+280÷14
304-240÷6×5 [300-(56+44)]÷25 7×(400-400÷5)
3636×42-4242×36
=( )×36×42-( ) ×42×36
=0
① []
②4.6+7.68﹣1+2.32
③1.25×2.5×0.4×8
④9.5×20%+