giúp giúp giúp giúp B=(0,75-0,6+3/7+3/13):(11/7+11/13+3,75-2,2) 19/08/2021 Bởi Valentina giúp giúp giúp giúp B=(0,75-0,6+3/7+3/13):(11/7+11/13+3,75-2,2)
B = (0,75 – 0,6 + 3/7 + 3/13) : (11/7 + 11/13 + 3,75 – 2,2) = (3/4 – 3/5 + 3/7 + 3/13) : (11/7 + 11/13 + 15/4 – 11/5) = (3/20 + 3/7 + 3/13) : (220/91 + 15/4 – 11/5) = (81/140 + 3/13) : (2245/364 – 11/5) = 1473/1820 : 7221/1820 = 1473/1820 x 1820/7221 = 1473/7221 = 491/2407 Vậy B = 491/2407 Bình luận
Đáp án: 491/2407 Giải thích các bước giải: B=(0,75-0,6+3/7+3/13):(11/7+11/13+3,75-2,2) =(3/4 -3/5 +3/7 +3/13) :(11/7 +11/13 +15/4 -11/5) =(3/20 +60 /91 ) :(220/91 +31/20) =1473/1820 :7221/1820 =1473.1820/7221.1820 =1473/7221 =491/2407 Bình luận
B = (0,75 – 0,6 + 3/7 + 3/13) : (11/7 + 11/13 + 3,75 – 2,2)
= (3/4 – 3/5 + 3/7 + 3/13) : (11/7 + 11/13 + 15/4 – 11/5)
= (3/20 + 3/7 + 3/13) : (220/91 + 15/4 – 11/5)
= (81/140 + 3/13) : (2245/364 – 11/5)
= 1473/1820 : 7221/1820
= 1473/1820 x 1820/7221
= 1473/7221
= 491/2407
Vậy B = 491/2407
Đáp án:
491/2407
Giải thích các bước giải:
B=(0,75-0,6+3/7+3/13):(11/7+11/13+3,75-2,2)
=(3/4 -3/5 +3/7 +3/13) :(11/7 +11/13 +15/4 -11/5)
=(3/20 +60 /91 ) :(220/91 +31/20)
=1473/1820 :7221/1820
=1473.1820/7221.1820
=1473/7221
=491/2407