a) (-54) - (36-45) d) \(\dfrac{1}{5}\)+\(\dfrac{1}{6}\) e) \(\dfrac{5}{7}+\dfrac{8}{14}\)
b) 26 - (-43-33) b) \(\dfrac{9}{10}+\dfrac{12}{6}\) k)\(\dfrac{5}{4}-\dfrac{7}{8}+\dfrac{6}{5}\)
c) 52 - [31+(3*-2)]
dấu * là số 0 ...
Đọc tiếp
a) (-54) - (36-45) d) \(\dfrac{1}{5}\)+\(\dfrac{1}{6}\) e) \(\dfrac{5}{7}+\dfrac{8}{14}\)
b) 26 - (-43-33) b) \(\dfrac{9}{10}+\dfrac{12}{6}\) k)\(\dfrac{5}{4}-\dfrac{7}{8}+\dfrac{6}{5}\)
c) 52 - [31+(3*-2)]
dấu * là số 0
a) −54 − (36 − 45) = −54 − (−9) = −54 + 9 = −45
b) 26 − (−43 − 33) = 26 − (−76) = 26 + 76 = 102
c) 52 − [31 + (3^0 − 2)] = 52 − [31 + (1 − 2)] = 52 − [31 − 1] = 52 − 30 = 22
d) 1/5 + 1/6 = 6/30 + 5/30 = 11/30
e) 5/7 + 8/14 = 10/14 + 8/14 = 18/14 = 9/7
b) 9/10 + 12/6 = 9/10 + 20/10 = 29/10
k) 5/4 - 7/8 + 6/5 = 50/40 - 35/40 + 48/40 = 63/40