Вычислите устно:а)16 x10+190-0,2:5x7
б) 800:25x30-510:10x2
в)7:5-0,2x6+3,8:5
г)0,5x20+1,8:4,1+5,2:1,2
д)4-2,8x7:0,4x0,01+3,3
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