解:7/10+2/5等于( 11/10 ),【即等于1.1】 ∵已知需求出7/10+2/5等于多少 X + Y = Z ∴7/10 + 2/5 = 7/10 + (2×2)/(5×2) = 7/10 + 4/10 = (7+4)/10 = 11/10 = 1.1 答:7/10+2/5等于11/10,【即等于1.1】
解:7/10+2/5=7/10+4/10=11/10
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