1-3/7=4/7
29*1/3+1/3-2.7÷(0.5+3÷7.5)
=30/3-2.7÷(1/2+2/5)
=10-2.7×10/9
=10-3
=7
X-3/4X=2/9
(1-3/4)X=2/9
1/4X=2/9
X=2/9×4
X=8/9
填空:51的因数有(3、17、1、51 ),51最小的倍数(51 )
努力!努力!再努力!
1-3/7=4/7
29*1/3+1/3-2.7÷(0.5+3÷7.5)
=30/3-2.7÷(1/2+2/5)
=10-2.7×10/9
=10-3
=7
X-3/4X=2/9
(1-3/4)X=2/9
1/4X=2/9
X=2/9×4
X=8/9
填空:51的因数有(3、17、1、51 ),51最小的倍数(51 )
努力!努力!再努力!