выполните действия: под номером 2,3,5,6. Created by shcola42. matematika-ru

выполните действия: под номером 2,3,5,6...

shcola42 @shcola42

July 2022 1 11 Report

выполните действия: под номером 2,3,5,6

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prettypushkova

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№ 2. 5,2 * (-0,8) - (-1,5) * (-3,4) = - 9,26
1) 5,2 * (-0,8) = - 4,16
2) (-1,5) * (-3,4) = 5,1
3) - 4,16 - 5,1 = - (4,16 + 5,1) = - 9,26

№ 3. (7,6 - 20) * (-3,14 + 5,24) = - 26,04
1) 7,6 - 20 = - (20 - 7,6) = - 12,4
2) (-3,14) + 5,24 = 5,24 - 3,14 = 2,1
3) (-12,4) * 2,1 = - 26,04

№ 5. (8 + 2 1/7 * (-3 1/9)) * (-27/44) = - 9/11
1) 2 1/7 * (-3 1/9) = 15/7 * (-28/9) = - 20/3 = - 6 2/3
2) 8 + (-6 2/3) = 7 3/3 - 6 2/3 = 1 1/3
3) 1 1/3 * (-27/44) = 4/3 * (-27/44) = - 9/11

№ 6. (-5 1/16 + 1 1/8) * (-5/6 - 3/14) = 4 1/8
1) -5 1/16 + 1 1/8 = - (5 1/16 - 1 2/16) = - 3 15/16
2) -5/6 - 3/14 = -35/42 - 9/42 = - 44/42 = - 1 2/42 = - 1 1/21
3) - 3 15/16 * (-1 1/21) = -63/16 * (-22/21) = 33/8 = 4 1/8

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