(1)306×5=1530,
306
;× 5 1530
验算:
306
5
1530
15 30
;30 0
(2)576÷8=72;
72
8
576
56 16
;16 0
验算:
72
;× 8 576
(3)814÷4=203…2;
203
4
814
8 14
;12 2
验算:
203
× 4 812
;+ 2 814
(4)(60+80)÷7,
=140÷7,
=20;
(5)894-60×3,
=894-180,
=714;
(6)6×29×5,
=174×5,
=870;
故答案为:1530,72,203…2,20,714,870.