六年级数学题，着急，( ⊙ o ⊙ )啊！

41×101 =41*（100+1）=4100+41=4141
4.05-2.8-0.7 =4.05-(2.8+0.7)=4.05-3.5=0.55
12×（4分之1+6分之1-3分之1）=12*1/4+12*1/6-12*1/3=3+2-4=1

1．41*101=41*(100+1)=41*100+41=4100+41=4141 2．4.05-2.8-0.7=(405-280-70)/100=55/100=0.55 3．12*(1/4+1/6-1/3)=12*1/4+12*1/6-12*1/3=3+2-4=1

41×101
=41×100+41×1
=4100+41
=4141
4.05-2.8-0.7
=4.05-(2.8+0.7)
=4.05-3.5
=0.55
12×(1/4+1/6-1/3)
=12×1/4+12×1/6-12×1/3
=3+2-4
=1

41×101
=41×100+41×1
=4100+41
=4141

4.05-2.8-0.7
=4.05-(2.8+0.7)
=4.05 -3.5
=0.55

12×（4分之1+6分之1-3分之1）
=12×4分之1+12×6分之1-12×3分之1
=3+2-4
=1

41*101=41*(100+1)=4100+41=4141
4.05-2.8-0.7=4.05-3.5=0.55
12*(1/4+1/6-1/3)=3+2-4=1

1、41×101=41×（100+1）=4100+41=4141 2、4.05-2.8-0.7=4+0.05-3+0.2-1+0.3=4-3-1+（0.05+0.2+0.3）=0+0.55=0.55 3、=3+2-4=1