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Danik558
@Danik558
June 2022
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Выполните действия: 1)12 3/5-7 1/6+2 3/10 2)4/5:2 2/3+3 1/2 3)170 8/51-2 4/9:3 2/3
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antoniolio
Verified answer
1) 123/5-7 1/6+2 3/10=7 11/15
1. 123/5 – 7 1/6=63/5-43/6=(63*6-43*5)/30=(378-215)/30=163/30=513/30
2.5 13/30+2 3/10=163/30+23/10= (163*1+23*3)/30=(163+69)/30=232/30=116/15=7 11/15
2)4/5:2 2/3+3 1/2=3 4/5
1.4/5:2 2/3=4/5: 8/3=4*3/5*8=12/40=3/10
2.3/10+3 1/2=3/10+7/2=(3*1+7*5)/10=38/10=19/5=3 4/5
3) 170 8/51-24/9:3 2/3=169 25/51
1.2 4/9:3 2/3=22/9:11/3=22*3/9*11=66/99=2/3
2.170 8/51-2/3=8678/51-2/3=(8678*1-2*17)/51=8644/51=169 25/51
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Answers & Comments
Verified answer
1) 123/5-7 1/6+2 3/10=7 11/151. 123/5 – 7 1/6=63/5-43/6=(63*6-43*5)/30=(378-215)/30=163/30=513/30
2.5 13/30+2 3/10=163/30+23/10= (163*1+23*3)/30=(163+69)/30=232/30=116/15=7 11/15
2)4/5:2 2/3+3 1/2=3 4/5
1.4/5:2 2/3=4/5: 8/3=4*3/5*8=12/40=3/10
2.3/10+3 1/2=3/10+7/2=(3*1+7*5)/10=38/10=19/5=3 4/5
3) 170 8/51-24/9:3 2/3=169 25/51
1.2 4/9:3 2/3=22/9:11/3=22*3/9*11=66/99=2/3
2.170 8/51-2/3=8678/51-2/3=(8678*1-2*17)/51=8644/51=169 25/51