①207×30=
②182÷24=
③★962÷28=
④145×27=
362404362040 26470502647005
42×5656×45 24×1812×36
3.7+5.6= 2.4÷0.08= += 8﹣= 0.23=
×6.4= ×= 3÷1%= 4a+a= 6×÷6×=