ldcf.net
当前位置:首页 >> 能用用简便方法计算的就用简便方法2.8×7.6+1.4×2.8... >>

能用用简便方法计算的就用简便方法2.8×7.6+1.4×2.8...

(1)2.8×7.6+1.4×2.8+2.8 =2.8×(7.6+1.4+1)=2.8×10=28(2)4.5×1.2-3.15÷15=5.4-0.21=5.19(3)[12.8-(7.5+4.5)]×2.5=[12.8-12]×2.5=0.8×2.5=2(4)0.65+2.7+0.35+7.3 =(0.65+0.35)+(2.7+7.3)=1+10=11(5)3.8×0.56+0.56×6.2=(3.8+6.2...

(1)2.8×7.6+1.4×2.8+2.8=2.8×(7.6+1.4+1)=2.8×10=28;(2)70.8-0.8×0.5=70.8-0.4=70.4;(3)13-3.79-6.21=13-(3.79+6.21)=13-10=3;(4)5×(40+0.7)=5×40+5×0.7=200+3.5=203.5;(5)4.12-1.78-1.22=4.12-(1.78+1.22)=4.12-3=1.12;...

2.8×7.6+1.4×2.8+2.8 =2.8×(7.6+1.4+1) =2.8×10 =28

=7.8×(2.8÷1.4) =7.8X2 =15.6 很高兴为你解答有用请采纳

楼上的悲催了

2.37*6.3/2.37*3.7 =(6.3/3.7)*(2.37/2.37) =6.3/3.7 =63/37 2.5*1.25*0.32 =2.5*1.25*0.4*0.8 =2.5*0.4*(1.25*0.8) =1*1 =1 3.8*10.1 =3.8*(10+0.1) =3.8*10+3.8*0.1 =38+0.38 =38.38 2.4*0.8-4.48/2.8 =2.4*0.8-1.6 =(2+0.4)*0.8-1.6 =2*0.8+0...

(1)12.6-0.84×5÷1.4,=12.6-4.2÷1.4,=12.6-3,=9.6;(2)2.8×0.25+7.2×0.25,=(2.8+7.2)×0.25,=10×0.25,=2.5;(3)7.24×[1÷(3.1-3.09)],=7.24×[1÷0.01],=7.24×100,=724;(4)0.18×(4.6-0.598÷0.46),=0.18×(4.6-1.3),=0.18...

(1)12.6-0.84×5÷1.4,=12.6-4.2÷1.4,=12.6-3,=9.6;(2)2.8×0.25+7.2×0.25,=(2.8+7.2)×0.25,=10×0.25,=2.5;(3)7.24×[1÷(3.1-3.09)],=7.24×[1÷0.01],=7.24×100,=724;(4)0.18×(4.6-0.598÷0.46),=0.18×(4.6-1.3),=0.18×...

你好,以下为题。 1.2+1.5=2.7 1.3+1.5=2.8 0.2+1.2=1.4 1.3+1.08=2.38 5.5+2.1=7.6 7.8+1.9=9.7 1.02+1.03=2.05 1.2+1.5=2.7 1.5+1.7=3.2 1.3+1.5=2.8 0.2+1.2=1.4 1.3+1.08=2.38 5.5+2.1=7.6 7.8+1.9=9.7 1.02+1.03=2.05 1.2+1.5=2.7 1.3+1.5=...

得x=19ǜ-6(5/6x+1/4)5-5/2)=2(X-3/2系数化为1;2)=2(X-3/2移项,得5-5x+3=2x-3/:去括号;2=2x-3/6×1/,得-7x=-19/,得-5x-2x=-3/145-6(5/2-5-3合并;4)解

网站首页 | 网站地图
All rights reserved Powered by www.ldcf.net
copyright ©right 2010-2021。
内容来自网络,如有侵犯请联系客服。zhit325@qq.com