来自孙晓东的问题
【递等式一共4题答4题①1/3×1/15+1/3×1/5②3/4-5/8×3/4③14/25÷(1/5+1/2)④[3/4-(7/16-0.25)]×17/9】
递等式一共4题答4题
①1/3×1/15+1/3×1/5②3/4-5/8×3/4③14/25÷(1/5+1/2)④[3/4-(7/16-0.25)]×17/9


【递等式一共4题答4题①1/3×1/15+1/3×1/5②3/4-5/8×3/4③14/25÷(1/5+1/2)④[3/4-(7/16-0.25)]×17/9】
递等式一共4题答4题
①1/3×1/15+1/3×1/5②3/4-5/8×3/4③14/25÷(1/5+1/2)④[3/4-(7/16-0.25)]×17/9
①1/3×1/15+1/3×1/5=1/3×﹙1/15+1/5﹚=1/3×4/15=4/45②3/4-5/8×3/4=3/4×﹙1-5/8﹚=3/4×3/8=9/32③14/25÷(1/5+1/2)=14/25×10/7=4/5④[3/4-(7/16-0.25)]×17/9=[3/4-7/16+1/4]×1...
最后一题是17/16吧
是的。对不起,我打错了。