80×3.8×0.125 8.5﹣(5.6+4.8)÷1.3
: =6:x
①400﹣288÷24×5
②10.28+8.14﹣5.28+1.86
③
④
21.36÷0.8﹣12.9
×53+0.6×46+60%
3.7+5.6= 2.4÷0.08= += 8﹣= 0.23=
×6.4= ×= 3÷1%= 4a+a= 6×÷6×=