求下面各组数的最大公因数和最小公倍数．
10和9
14和42
26和39．
直接写出得数．
18×
=
÷
= 0.25×3.2×4= 32×（1﹣0.99）=
25%×4= 0÷=
÷=
×
÷×=
直接写得数
72×
= 1.25×8= 2.9+6.1=
+
=
÷
=
×
= 25÷75=
÷
=
1.2×
= 5÷
=
直接写出得数．
①
×4= ②0.5+1= ③3
×
= ④2﹣0.7=
⑤2÷0.7= ⑥3.5﹣﹣2
= ⑦6×（
+）= ⑧5.5×4+5.5×6=
⑨4
﹣（+1
）= ⑩4
÷4=
直接写得数
×15= 
=87﹣32= 0.62=
8﹣0.8= 3.2×4= 7.2÷4= 24÷
= 
×
=
﹣
= ．
直接写得数．
36×
= 24÷
=
+
= 3.6﹣（1.5+1.6）=
6﹣2.98= 10×=
÷1.25=
+
﹣+=