Question

Какое свойство помогает вычислить рационально?
(190 - 15)2)
5. (630.4)
(639 (4) 5
(7 250 (2) 5
(332(4):5)
200. (965)
(103.50) 4
(625200).5
Помогите дам 25б​

Answer 1

( 190 × 5) × 2 = ( 5 × 2) × 190 = 1 900. 5 × ( 630 × 4) = (5 × 4) × 630 = 12 600 . (639 × 4) × 5 = ( 4 × 5) × 639 = 12 780. ( 7 250 × 2) × 5 = ( 2 × 5) × 7 250 = 72 500 . ( 332 × 4) × 5 = (4 × 5 ) × 332 = 6 640 . 200 × ( 96 × 5) = ( 200 × 5 ) × 96 = 96 000 . ( 103 × 50) × 4 = ( 50 × 4 ) × 103 = 20 600 . (625 × 200) × 5 = ( 200 × 5 ) × 625 = 625 000 .