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pchela6100
@pchela6100
July 2022
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Пожалуйста помогите! Вычислить:
1) 2 целых 11/24 :0,75 - 1 целая 11/30
2) 4 целых 1/3 : 13 +20 : 1 целая 1/4 + 0,125 × 40
3) 6 целых 53/56 - 2,375 + 1,2 × 0,5 : 4/5
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Katya280408
1)
а)2 11/24:0,75=59/24:75/100=59/24: 3/4=59/24×4/3=236/72=59/18=3 5/18
б)3 5/18-1 11/30=59/18-41/30=295/90-123/90=172/90=86/45=1 41/45
2)
а)4 1/3:13=13/3×1/13=13/39
б)20:1 1/4=20/1:5/4=20/1×4/5=80/5=16
в) 0,125×40=125/100×40=5/4×40/1=200/4=50
г) 13/39+16+50=66 13/39
3)
а) 1,2×0,5=12/10×5/10=60/20=3
б) 3: 4/5=3/1×5/4=15/4=3 3/4
в) 6 53/56-2,375=389/56-2375/1000=389/56- 19/8=389/56-133/56=256/56=32/7=4 4/7
г) 4 4/7+3 3/4=32/7+15/4=128/28+105/28=233/28=8 9/28
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Answers & Comments
а)2 11/24:0,75=59/24:75/100=59/24: 3/4=59/24×4/3=236/72=59/18=3 5/18
б)3 5/18-1 11/30=59/18-41/30=295/90-123/90=172/90=86/45=1 41/45
2)
а)4 1/3:13=13/3×1/13=13/39
б)20:1 1/4=20/1:5/4=20/1×4/5=80/5=16
в) 0,125×40=125/100×40=5/4×40/1=200/4=50
г) 13/39+16+50=66 13/39
3)
а) 1,2×0,5=12/10×5/10=60/20=3
б) 3: 4/5=3/1×5/4=15/4=3 3/4
в) 6 53/56-2,375=389/56-2375/1000=389/56- 19/8=389/56-133/56=256/56=32/7=4 4/7
г) 4 4/7+3 3/4=32/7+15/4=128/28+105/28=233/28=8 9/28