计算。5-4= 3-3= 4-2= 5-5= 4-1=5-0= 5-0= 1-0= 5-4= 5-2=5-3= 3-3= 5-5= 0-0= 5-2=3-2= 2-0= 4-3= 3-1= 4-1=
找规律 1×1= 11×11= 111×111= 1111×1111= 11111×11111= 111111×111111=
(1)856+4293(2)5014-4293(3)2405÷(85-48)
7(4-x)=9(x-4) 128-5(2x+3)=73
x×(+)=6x-10=8 8-x=x÷0.24=100
80÷x=2012x+8x-12=28 (2x-1)+10=371.6x+3.4x-x-5=27 (3x+5)÷2=(5x-9)÷3x-21×=4x÷=÷