4.5+5.5+0.42的简便运算

黎奋哈40794.5+5.5x0.42简便计算 -
荀娄斧18012157446 ______ 利用乘法分配律,把0.42分成0.4+0.02得:4.5+5.5*(0.4+0.02)得:4.5+5.5*0.4+5.5*0.02得:4.5+2.2+0.11=6.81

黎奋哈40794.5*0.4+0.55*4简便运算 -
荀娄斧18012157446 ______ 4.5*0.4+0.55*4=0.45*4+0.55*4=4*(0.45+0.55)=4*1=4

黎奋哈40799. 9*4.5+0.45怎样简便计算. -
荀娄斧18012157446 ______ 9. 9*4.5+0.45 =99x0.45+0.45 =(99+1)x0.45 =100x0.45 =45

黎奋哈40790.63*4.5+0.55*6.3的简便算法,答出来的加分. -
荀娄斧18012157446 ______ 0.63*4.5+0.55*6.3 =0.63*4.5+5.5*0.63 =0.63(4.5+5.5) =0.63*10 =6.3

黎奋哈40794.5十5.5x0.42 -
荀娄斧18012157446 ______ 最普遍的:5.5x0.42=2.31 2.31+4.5=6.81 也可以这样: 5.5x0.42=5.5x(0.4+0.02)=5.5x0.4+5.5x0.02=2.2+0.11=2.31 2.31+4.5=6.81 望采纳

黎奋哈40790.45x65+4.5x3.5简算 -
荀娄斧18012157446 ______ 4.5x4.5+0.45x65-4.5=4.5*4.5+4.5*6.5-4.5=4.5*(4.5+6.5-1)=4.5*10=45

黎奋哈40794.2*5.5+0.42*45的简便算法 -
荀娄斧18012157446 ______ 原式=0.42*55+0.42*45=0.42*(55+45)=0.42*100=42

黎奋哈40792.9*0.45+0.29*5.5用简便方法计算 -
荀娄斧18012157446 ______ 2.9*0.45+0.29*5.5 =0.29*4.5+0.29*5.5 =0.29*(4.5+5.5) =0.29*10 =2.9

黎奋哈4079简便计算 4.5+5.5x3.6 -
荀娄斧18012157446 ______ 简便计算4.5+5.5x3.6=4.5+5.5*(4-0.4)=4.5+22-2.2=24.3

黎奋哈40793.75*4.5+37.5*0.55用两种方法简便计算 -
荀娄斧18012157446 ______ 3.75*4.5+37.5*0.55 =3.75*4.5+3.75*5.5 =3.75x(4.5+5.5) =3.75x10 =37.5 3.75*4.5+37.5*0.55 =37.5*0.45+37.5*0.55 =37.5x(0.45+0.55) =37.5x1 =37.5 很高兴为您解答,祝你学习进步!【the1900】团队为您答题. 有不明白的可以追问!如果您认可我的回答. 请点击下面的【选为满意回答】按钮,谢谢!