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 = .
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 = ... .