Задание

Вычислите наиболее удобным способом.

1) 594 + 847 + 6 + 153 = \(594 \+ **\.\.\.** \) + \(847 \+ **\.\.\.** \) = ... + ... = ... ;
2) 2 • 9 • 5 • 5 • 8 • 20 = \(2 • 9\)\( **\.\.\.** • 8\)\( **\.\.\.** • 20\) = ... • 40 • ... = ... ;
3) 72 • 34 + 72 • 66 = ...\(34 \+ 66\) = ... • 100 = ... ;
4) \(614 \+ 978\) – 978 = 614 + \( **\.\.\.** – 978\) = ... ;
5) 832 – \(732 \+ 5\) = \( **\.\.\.** **\.\.\.** **\.\.\.** \) ... ... = ... – 15 = ... ;
6) 341 • 715 – 241 • 715 = \(341 – 241\)... = 100 • 715 = ... .