1. 8,4 • (- 2, 5) = -(8,4•2,5) = -21
2) (- 4 3/4)(- 7 4/21) = (-19/4) • (-151/21) = 19/4 • 151/21 = (19•151) / (151•21) = 2869/84 = 34 13/84
3) 26, 88 / (- 3, 2) = 672/25 : (-16/5) = 672/25 • (-5/16) = - (672•5)/(25•16) = 3360/400 = 42/5 = 8 2/5
4 )-10,24:(-0,64) = 10,24 : 0,64 = 16 Как делить 10,24 : 0,64 показано на фото внизу.
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Answers & Comments
1. 8,4 • (- 2, 5) = -(8,4•2,5) = -21
2) (- 4 3/4)(- 7 4/21) = (-19/4) • (-151/21) = 19/4 • 151/21 = (19•151) / (151•21) = 2869/84 = 34 13/84
3) 26, 88 / (- 3, 2) = 672/25 : (-16/5) = 672/25 • (-5/16) = - (672•5)/(25•16) = 3360/400 = 42/5 = 8 2/5
4 )-10,24:(-0,64) = 10,24 : 0,64 = 16
Как делить 10,24 : 0,64 показано на фото внизу.