(-3/5)×(-12)+0.27×5/9+(-12)×(-2/5)+4/9×0.27=?
(-3/5)×(-12)+0.27×5/9+(-12)×(-2/5)+4/9×0.27=?
5x+3=x-4,4y+11=22,11x+68-2x=100-9x,0.1x/0.2-(0.27x+0.18)/0.0
(1)1除5/7乘1又2/5(2)(0.27加9/10)除9(3)57又1/13除7等于多少?
6/7×5/9+4/9×6/7(简便计算) 0.8-(2/3+1/12)×8/9 5/6÷(6-5/12-7/12
(5x-2)/3=1+(3x-1)/4的解和0.1x/0.2-(0.27x+0.18)/0.04=1的解
简便方法计算(过程写出来):7/9+(2/3-4/9)= 12/5-(5/6+2/5)= 13/15-5/12-1/12
3-{(-3)-12}= 8-(9-10)= (3-5)-(6-10)= 0-1+2-3+4-5= -4.2+5.7-8
24点:(1)12 5 2 13 (2)1 5 9 12 (3)3 5 12 12 (4)9 2 11 11 (5)3
4,3,1,12,9,3,17,5(A)
算24点:(1)1 5 9 12 (2)1 6 10 13 (3)2 4 8 11(4)3 5 12 12
5+(-9)= 11-(+7)= (-12)-(+2.1)= -(-15)-(-8) (-2/3)
(5/12-3/7)-(4/7-7/12)这道题能简算吗?2又5分之2吨=9( )吨( )千克