4.5+5.5x6.9简便计算

禹栏歪4680能简便计算的要简便计算 6.15*9.4 - 42= 4.5*0.9+5.5*0 -
甫才录18097802353 ______ 6.15*9.4-42= 57.81-42=15.81 4.5*0.9+5.5*0.9=(4.5+5.5)x0.9=10x0.9=9

禹栏歪4680简便运算:1 (4.5x9.9+5.5x9.9)x2.8 2 7.8*99+3.9*2 3(1.9 - 1.9*0.9)/(3.8 - 2.8) -
甫才录18097802353 ______ (4.5x9.9+5.5x9.9)x2.8 =(4.5+5.5)*9.9*2.8=10*9.9*2.8=99*2.8=(100-1)*2.8=280-2.8=277.27.8*99+3.9*2 =7.8*99+7.8=7.8*(99+1)=7.8*100=780 (1.9-1.9*0.9)/(3.8-2.8)=1.9*(1-0.9)/1=1.9*0.1=0.19

禹栏歪46804.5*0.9的简便算法. -
甫才录18097802353 ______ 4.5x(1-0、1)=4.5一0.45 =4.55

禹栏歪4680用简便的方法计算下面各题4,5*0.9+5.5*0.9 7.69*101 2.5*(7.2*0... -
甫才录18097802353 ______ (1)4.5*0.9+5.5*0.9,=(4.5+5.5)*0.9,=10*0.9,=9;(2)7.69*101,=7.69*(100+1),=7.69*100+7.69*1,=769+7.69,=776.69;(3)2.5*(7.2*0.04),=7.2*(2.5*0.04),=7.2*0.1,=0.72;(4)72*l.25,=(8*9)*1.25,=(8*1.25)*9,=10*9,=90;(5)0.26*10.1-0.26*0.1,=0.26*(10.1-0.1),=0.26*10,=2.6;(6)0.25+39*0.25,=0.25*(1+39),=0.25*40,=10.

禹栏歪46804.5+5.5*3.6简便运算 -
甫才录18097802353 ______ 4.5+5.5*3.6=4.5+5.5*(1+2.6)=4.5+5.5*1+5.5*2.6=4.5+5.5+5.5*2*1.3=10+11*1.3=24.3

禹栏歪46804.5*5.5+5.5*5.5的简便计算 -
甫才录18097802353 ______ 4.5x5.5+5.5x5.5 =5.5x(4.5+5.5) =5.5x10 =55

禹栏歪46800.23*5.5+6.9*1.5用简便方法计算 -
甫才录18097802353 ______ 0.23*5.5+6.9*1.5=0.23*(5.5+4.5)=2.3

禹栏歪46809. 9*4.5+0.45怎样简便计算. -
甫才录18097802353 ______ 9. 9*4.5+0.45 =99x0.45+0.45 =(99+1)x0.45 =100x0.45 =45

禹栏歪46804.5x5.4+5.5x4.6这道题怎样简便运算了
甫才录18097802353 ______ 4.5*5.4+5.5*4.6 =4.5*(10-4.6)+5.5*4.6 =45-4.5*4.6+5.5*4.6 =45+4.6*(5.5-4.5) =45+4.6 =49.6

禹栏歪4680小升初数学简便运算一道,求过程 -
甫才录18097802353 ______ (-5.5)*3.2+4.5*6.8=(4.5-10)*3.2+4.5*6.8=4.5*3.2+4.5*6.8-32=4.5*(3.2+6.8)-32=4.5*10-32=45-32=13