Question

Simplify using properties
1. 17×103
2. 691×98
3. 358×77+358×23
4. 987×6+987×3+987
5. 786×10×491-391-786
6. 1769×557+1769×663-1769×220
7. 17865×980+17865×19+17865​

Answer 1

1)1751

2)67718

3)35800