[10+(1-5/1-65%)/1]*0.4 (4/3=6/1=8/3)*2.4+9.9 525*48/(3*8*25)
[10+(1-5/1-65%)/1]*0.4 (4/3=6/1=8/3)*2.4+9.9 525*48/(3*8*25)
1/(1*3)+1/(2*4)+1/(3*5)+1/(4*6)+...+1/(8*10)=?
(-48)除以6-(-25)*(-4)+8= -15+6除以(-3)*3分之1= (4分之一-3分之一+6分之一)除以(
3-{(-3)-12}= 8-(9-10)= (3-5)-(6-10)= 0-1+2-3+4-5= -4.2+5.7-8
解方程:(1)4(2y+3)=8(1-y)-5(y-2);(2)5x-25+2=x+65
1/4*(-8/9)=?(-5/6)*(-3/10)=?-34/15*25=?(-0.3)*(-10/7)=?
1-57×21/25= 1/2+5/4×4/5= 1/6×(5-2/3)= 7/8×7+3/8=
1/1+(1/1+2)+(1/1+2+3)……+(1/1+2+3+4+5+6+7+8+9+10+11)=
计算:4分之1×(-9分之8)= (-6分之5)×(-10分之3)= -15分之34×25= (-0.3)×(-7分之1
(1+2+3+4+5+6+7+8+9+10)分之1=
(1/32-1/56)÷1/8简算 4/5x-0.4×3=5/3(解方程) 3/5x÷3/4=32
(1)0.3,0.4,0.5;(2)6,8,10;(3)4,5,6;(4)3/5,4/5,1;是勾股数的有几组?