2.5+4.8x1.25的简便计算

游旭耐1863(4十8)x1.25x0.25的简便运算 -
俞堂蚀18618328023 ______ (4+8)*1.25*0.25 =4*0.25*1.25+2*1.25*4*0.25 =1.25+2.5 =3.75

游旭耐18634.8x1,25用简便方法计算 -
俞堂蚀18618328023 ______ 4.8x1.25 =6x0.8x1.25 =6x(0.8x1.25) =6x1 =6

游旭耐18634.8x1.25 用简便方法怎么算? -
俞堂蚀18618328023 ______ 4 .8 x1.25 = 6 x0.8 x1.25 =6

游旭耐18631.25x(0.4+2.8)*2.5要巧算 -
俞堂蚀18618328023 ______[答案] (1.25x0.4+1.25x2+1.25x0.8)x2.5=(0.5+2.5+1)x2.5=4x2.5=10

游旭耐18631.25*(0.4+8)*2.5 简便计算. 谁先答,就采纳谁!1.25*(0.4+8)*2.5简便计算. 谁先答,就采纳谁! -
俞堂蚀18618328023 ______[答案] =1.25*0.4*2.5+1.25*8*2.5 =1.25*(0.4*2.5)+(1.25*8)*2.5 =1.25*1+10*2.5 =1.25+25 =26.25

游旭耐18633.2x1.25+4.8x1.25简便计算 -
俞堂蚀18618328023 ______ =1.25*(3.2+4.8)

游旭耐1863(8+0.8)x1.25 脱式计算 -
俞堂蚀18618328023 ______ =0.8*(1.25*0.4+2.5*0.4)=0.8*(0.5+1)=(0.8*0.5+0.8*1)=0.4+0.8=1.2

游旭耐18634.8x2.5x1.25 -
俞堂蚀18618328023 ______ 4.8x2.5x1.25 =(0.6x2.5)x(8*1.25) =1.5*10 =15

游旭耐1863(0.4+0.8)x1.25怎么简算? -
俞堂蚀18618328023 ______ (0.4+0.8)x1.25 =0.4x1.25+0.8x1.25 =0.5+1 =1.5

游旭耐18634*(2.5+1.25)简算 -
俞堂蚀18618328023 ______[答案] 6.4*(2.5+1.25) =0.8*8*(2.5+1.25) =0.8*(8*2.5+8*1.25) =0.8*(20+10) =0.8*30 =24