8.2x4.5+5.5简便计算

桑秋詹44168.3*4.5+0.83*55如何简便? -
咸杨桑13093479883 ______ =8.3*4.5+8.3*5.5 =8.3*(4.5+5.5) =8.3*10 =83

桑秋詹44165.5X8+4.5÷0.125的简便运算 -
咸杨桑13093479883 ______ 要记得0.125=1/8 则 5.5X8+4.5÷0.125=5.5X8+4.5X8=(5.5+4.5)X8=10X8=80

桑秋詹4416小升初数学简便运算一道,求过程 -
咸杨桑13093479883 ______ (-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

桑秋詹44167.8*4.5 5.5的简便算法 -
咸杨桑13093479883 ______ 7.8*4.5 5.5的简便算法7.8*4.5 5.5=35.1+5.5=40.6直接计算

桑秋詹44168.4+ 4.5+ 1.6 +5.5简便计算 -
咸杨桑13093479883 ______ 计算4.5x1.6+5.5=4.5x2x0.8+5.5=7.2+5.5=12.7

桑秋詹44164.78*4.5+9.98*5.5+4.5*5.2简便运算 -
咸杨桑13093479883 ______ 原式=(4.78+5.2)x4.5+9.98x5.5=9.98x4.5+9.98x5.5=9.98x(4.5+5.5)=9.98x10=99.8

桑秋詹44167.8x4.5+78x0.55简便运算 -
咸杨桑13093479883 ______ 把7.8*4.5改成78*0.45 运用乘法分配率78*(0.45+.055)=78*1=78

桑秋詹4416小数或整数的简便计算题,共需125题(四年级的) -
咸杨桑13093479883 ______ 简便计算 ① 5.4*0.75÷1.5② 270÷4.5③ 3.4*0.46+3.4*0.54 ④ 25.5÷〔(10-8.98)*2.5〕⑤ 2.5*(6.2-2.6)*0.4 ⑥ 12.6-(2.89+7.11)*1.01⑦ 6.3+4.82...

桑秋詹4416帮我出20道简便计算,每种方法都有点,但不能太难. -
咸杨桑13093479883 ______[答案] 75*102 =75*(100+2) =75*100+75*2 =7500+150 =7650 1.2*2.5 =(1+0.2)*2.5 =1*2.5+0.2*2.5 =2.5+0.5 =3 90.1-9.9 =(90+0.1)-... 解,得: ==0.8*3.5+5.5*0.5+0.8 ==0.8*(3.5+1)+5.5*0.5 ==0.8*4.5+5.5*(0.8-0.3) ==0.8*4.5+5.5*0.8-0.3*5.5 ==(4.5+5.5)*0.8-0....

桑秋詹4416五年级数学简便计算题你给我300道吧!暑假作业一天10道我去我奶家没网你就给我吧!!!!!拜托了 -
咸杨桑13093479883 ______ 6.9+4.8+3.1 0.456+6.22+3.78 15.89+(6.75-5.89)4.02+5.4+0.98 5.17-1.8