2/5×3/4-1/2+4
=3/10+(4-1/2)
=3/10+3+1/2
=3+4/5
=3又5分之4
猜你喜欢
- 1彩钢板 0.5mm,单价8.2元/kg,单价怎么换算成 元/m2
- 2求下列函数的导数 (1)y=2x^5-3x^2+5x-4 (2)y=cosx-4sinx (3)f(x)=2e^x ```
- 3what kind of clothes do you wear in winter?
- 4语文5年级下册15课读后感
- 51吨位的燃柴油导热油炉满负荷状态1小时耗柴油多少千克?
- 6my mother often tells me ______ (be)careful in the school.用适当形式填空
- 7妥善保管图书,不得乱丢 用英语怎么说
- 8求下列积分 1.∫(x+2倍根号x+3)/x dx 2.∫(x^2+sin^2x)/x^2sin^2x dx 3.∫cos^2(x/2) dx 谢啦,
- 9形容少年美好时光的词语
- 10neither of 它的谓语动词用单数还是复数