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кек642
@кек642
August 2022
2
2
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Пожалуйста вычислите:
13,79+7,21-9
-33+3,21-27+6,69
5,5-30+7+7,5
подействием
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Answers & Comments
jekadva
13,79+7,21-9=(13,79+7,21)-9=21-9=12
-33+3,21-27+6,69=(-33-27)+(3,21+6,69)=-60+10=-50
5,5-30+7+7,5 =(5,5+7,5+7)-30=20-30=-10
0 votes
Thanks 1
RainbowGayKate
13,79+7,21-9=12
1) 13,79+7,21 =21
2) 21 - 9 = 12
-33+3,21-27+6,69 = -50,1
1) -33+3,21 = -29,79
2) -29,79 - 27 = -56,79
3) -56,79 + 6,69 = -50,1
5,5-30+7+7,5 = -10
1) 5,5-30 = -24,5
2) -24,5 + 7 = -17,5
3) -17,5 + 7,5 = -10
1 votes
Thanks 1
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Answers & Comments
-33+3,21-27+6,69=(-33-27)+(3,21+6,69)=-60+10=-50
5,5-30+7+7,5 =(5,5+7,5+7)-30=20-30=-10
1) 13,79+7,21 =21
2) 21 - 9 = 12
-33+3,21-27+6,69 = -50,1
1) -33+3,21 = -29,79
2) -29,79 - 27 = -56,79
3) -56,79 + 6,69 = -50,1
5,5-30+7+7,5 = -10
1) 5,5-30 = -24,5
2) -24,5 + 7 = -17,5
3) -17,5 + 7,5 = -10