0.3+2.5+0.4简便算法

燕缪青2330简便计算:2.5x2.3+1.2+0.25 -
钮河泡13845977580 ______ 2.5*(2+0.3)+1.2+2.5*0.1 =2.5*(2+0.4)+2.4*0.5 =(2.5+0.5)*2.4 =7.2

燕缪青23302.3/2.5的简便计算急急急 -
钮河泡13845977580 ______ 2.3/2.5=(2.3+2.3)/(2.5+2.5)=4.6/5=0.92 或者2.3/2.5=(2.3+2.3)/(2.5+2.5)=4.6/5=(4.6+4.6)/(5+5)=9.2/10=0.92 再或者2.3/2.5=(2.5-0.2)/2.5=1-0.2/2.5=1-0.2*0.4=1-0.08=0.92

燕缪青23300.96x25+2.5x0.3+0.25的简便算法 -
钮河泡13845977580 ______ 0.96*25+2.5*0.3+0.25=9.6*2.5+2.5*0.3+2.5*0.1=2.5*(9.6+0.3+0.1)=2.5*(9.9+0.1)=2.5*10=25

燕缪青2330小明用铁丝制作了一个长3分米,宽2.5米,高4分米的长方形框架,再在各个面上围上红纸做了一个捐款箱 -
钮河泡13845977580 ______ 0.3*4+2.5*4+0.4*4=12.8米铁丝,0.75*2+1*2+0.12*2=3.74平方米红纸

燕缪青2330求五年级简便运算100到题 -
钮河泡13845977580 ______ *是乘号 /是除号 0.3*2.5*0.4 50*0.13*0.2 0.8*630*0.125 0.78*101 1.5*102 9.8*25 1.2*2.5+0.8*2.5 1.25*0.7*0.8 0.038*5*2.1 3.8+4.5+6.2 93/0.31/3 3.25-0.84-0.16 88*0.25*...

燕缪青23302.3人2.5x0.4的简便方法 -
钮河泡13845977580 ______ 2.3+2.5x0.4=2.3+0.25*4=2.3+1=3.3

燕缪青2330简便方法. 2.3*2.5*0.4 0.29*102 1.2*2.5+ -
钮河泡13845977580 ______ 2.3*2.5*0.4 =2.3*(2.5*0.4) =2.3*1 =2.3 0.29*102 =0.29*(100+2) =0.29*100+0.29*2 =29+0.58 =29.58 1.2*2.5+0.8*2.5 =(1.2+0.8)*2.5 =2*2.5 =5 1.25*0.4*8*2.5 =1.25*8*(0.4*2.5) =10*1 =10 0.125*72 =0.125*8*9 =1*9 =9 0.25*39+0.25 =0.25*(39+1) =0.25*40 =10

燕缪青23300.25X3.7ⅹ0.4 简便运算? -
钮河泡13845977580 ______ 简便计算过程方法如下 解:0.25*3.7*0.4 =(0.25*0.4)*3.7 =0.1*3.7 =0.37

燕缪青2330直接写出下面各题的得数.0.5+0.4= 7.6+0.3= 0.8 - 0.1= 2.3+4.5=5.3+1.6= 4.9 - 2.5= 7.3+2.6= 5.9 - 3.2=1 - 0.5= 4.2+2.6= 8.7 - 3.5= 3.6+5.2= -
钮河泡13845977580 ______[答案] 0.5+0.4=0.9; 7.6+0.3=7.9; 0.8-0.1=0.7; 2.3+4.5=6.8; 5.3+1.6=6.9; 4.9-2.5=2.4; 7.3+2.6=9.9; 5.9-3.2=2.7; 1-0.5=0.5; 4.2+2.6=6.8; 8.7-3.5=5.2; 3.6+5.2=8.8.

燕缪青2330小学五年级小数的简便运算:(1+0.2+0.3+0.4)x(0.2+0.3+0.4+0.5)x(0.2+0.3+0.4) -
钮河泡13845977580 ______[答案] 设a=0.2+0.3+0.4+0.5=1.4 原式=(a+0.5)*a*(a-0.5) =(a²-0.5²)*a =1.4³-0.25*1.4 =2.394 出题的真坑人啊,一点都不简便