2+4=62
10+13=233
59+73=13214
127+246=?
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
Phương pháp giải:
Thực hiện phép tính lần lượt từ trái sang phải.
Lời giải chi tiết:
83 − 7 − 6 = 70 83 − 13 = 70
53 − 9 − 4 = 40 53 − 13 = 40
73 − 5 − 8 = 60 73 − 13 = 60
a: -127+208-73+92
\(=\left(-127-73\right)+\left(208+92\right)\)
\(=300-200=100\)
b: \(-46+391+246-691\)
\(=\left(-46+246\right)+\left(391-691\right)\)
\(=200-300=-100\)
c: \(-472+\left(235-28\right)-\left(35-350\right)\)
\(=-472+235-28-35+350\)
\(=\left(-472-28\right)+350+\left(235-35\right)\)
\(=-500+350+200=50\)
a) -127+208-73+92
=(−127−73)+(208+92)
=300−200
=100
b) −46+391+246−691
=(−46+246)+(391−691)
=200−300
=−100
c) −472+(235−28)−(35−350)
=−472+235−28−35+350
=(−472−28)+350+(235−35)
=−500+350+200
=50
\(1.\) \(\dfrac{7}{36}-\dfrac{8}{-9}+\dfrac{-2}{3}=\dfrac{7}{36}+\dfrac{8}{9}-\dfrac{2}{3}=\dfrac{7+32-24}{36}=\dfrac{5}{12}.\)
\(2.\) \(\dfrac{-1}{2}+\dfrac{3}{7}-\dfrac{1}{9}+\dfrac{-7}{18}+\dfrac{4}{7}=\dfrac{-9-2-7}{18}+\dfrac{4+3}{7}=\dfrac{-18}{18}+\dfrac{7}{7}=-1+1=0.\)
\(3.\) \(-\dfrac{10}{3}+\dfrac{13}{10}-\dfrac{1}{6}+\dfrac{1}{10}=\dfrac{13+1}{10}+\dfrac{-20-1}{6}=\dfrac{14}{10}+\dfrac{-21}{6}=\dfrac{7}{5}-\dfrac{7}{2}=-\dfrac{21}{10}.\)
\(4.\) \(\dfrac{10}{17}-\dfrac{5}{13}-\left(-\dfrac{7}{17}\right)-\dfrac{8}{13}+\dfrac{11}{25}=\dfrac{10+7}{17}+\dfrac{-5-8}{13}+\dfrac{11}{25}=\dfrac{17}{17}-\dfrac{13}{13}+\dfrac{11}{25}=\dfrac{11}{25}.\)
1: \(=\dfrac{7}{36}+\dfrac{32}{36}+\dfrac{-24}{36}=\dfrac{15}{36}=\dfrac{5}{12}\)
2: \(=\left(-\dfrac{1}{2}-\dfrac{1}{9}-\dfrac{7}{18}\right)+\dfrac{3}{7}+\dfrac{4}{7}\)
\(=\dfrac{-9-2-7}{18}+1=-1+1=0\)
3: \(=\left(-\dfrac{10}{3}-\dfrac{1}{6}\right)+\dfrac{14}{10}\)
\(=-\dfrac{21}{6}+\dfrac{14}{10}=\dfrac{-7}{2}+\dfrac{14}{10}=\dfrac{-35+14}{10}=-\dfrac{21}{10}\)
4: \(=\left(\dfrac{10}{17}+\dfrac{7}{17}\right)-\left(\dfrac{5}{13}+\dfrac{8}{13}\right)+\dfrac{11}{25}=\dfrac{11}{25}\)
a)
13 x 81 + 13 x 19
= 13 x ( 81 + 19 )
= 13 x 100 = 1300
b)
246 x 83 + 246 x 17
= 246 x ( 83 + 17 )
= 246 x 100
= 24600
c)
246 x 83 + 247 x 17
= 246 x 83 + 246 x 17 + 17
= 246 x ( 83 + 17 ) + 17
= 246 x 100 + 17
= 24600 + 17
= 24617
Ủng hộ mik nhak !!!
13x81+13x19
=13x(19+81)
=13x100
=1300
246x83+246x17
=246x(83+17)
=246x100
=24600
2 + 4 = 6 ; 4 - 2 = 2 => 2 + 4 = 62
10 + 13 = 23 ; 13 - 10 = 3 => 10 + 13 = 233
59 + 73 = 132 ; 73 - 59 = 14 => 59 + 73 = 13214
127 + 246 = ?-----------------------------
127 + 246 = 373 ; 246 - 127 = 119 => 127 + 246 = 373119