Question

Преобразуй выражения,переставляя слагаемые (или множители) так,чтобы упростить вычисления. 32+47+23+38 4*9*25 126+235+115 230+80+70+120 23*2*50 25*50*4*2

Answer 1

32 + 47 +23 + 38 = (32 + 38) + (47 + 23) = 70 +70 = 140

4 * 9 * 25 = 4 * 25 * 9 = 100 * 9 = 900

126 + 235 + 115 = 235 + 115 + 126 = 350 + 126 = 476

230 + 80 + 70 + 120 = (230 + 70) + (80 + 120) = 300 + 200 = 500

23 * 2 * 50 = 2 * 50 * 23 = 100 * 23 = 2300

25 * 50 * 4 * 2 = (25 * 4) * (50 * 2) = 100 * 100 = 10000  

Answer 2

32 + 47 + 23 + 38 can be simplified by rearranging the terms as follows: 32 + 38 + 47 + 23 = 70 + 70 = 140

4 * 9 * 25 can be simplified by rearranging the factors as follows: 4 * 9 * 25 = (4 * 25) * 9 = 100 * 9 = 900

126 + 235 + 115 can be simplified by rearranging the terms as follows: 126 + 115 + 235 = 241 + 235 = 476

230 + 80 + 70 + 120 can be simplified by rearranging the terms as follows: 230 + 120 + 80 + 70 = 350 + 150 = 500

23 * 2 * 50 can be simplified by rearranging the factors as follows: 23 * 2 * 50 = (23 * 50) * 2 = 1150 * 2 = 2300

25 * 50 * 4 * 2 can be simplified by rearranging the factors as follows: 25 * 50 * 4 * 2 = (25 * 2) * (50 * 4) = 50 * 200 = 10000