{1.7+1.7*(5.8-2.8)}+(1.75/1.4) 简便计算

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{1.7+1.7*(5.8-2.8)}+(1.75/1.4)简便计算{1.7+1.7*(5.8-2.8)}+(1.75/1.4)简便计算{1.7+1.7*(5.8-2.8)}+(1.75/1.4)简便

{1.7+1.7*(5.8-2.8)}+(1.75/1.4) 简便计算
{1.7+1.7*(5.8-2.8)}+(1.75/1.4) 简便计算

{1.7+1.7*(5.8-2.8)}+(1.75/1.4) 简便计算
{1.7+1.7*(5.8-2.8)}+(1.75/1.4)
=(1.7+1.7×3)+1.75÷1.4
=1.7×4+35/2×5/7
=1.7×4+12.5
=6.8+12.5
=19.3