tinh m=9/40-11/60+13/84-15/112
ai giai tui tich
tinh
m=9/40-11/60+13/84-15/112
ai giai tui tich ( giải cách thuận tiện)
M = \(\frac{9}{40}\)- \(\frac{11}{60}\)+\(\frac{13}{84}\)- \(\frac{15}{112}\)
M = 378/1680 - 308/1680+ 260/1680- 225/1680
M = 105/1680
\(\frac{9}{40}-\frac{11}{60}+\frac{13}{84}-\frac{15}{112}=\frac{27}{120}-\frac{22}{120}+\frac{13}{84}-\frac{15}{112}=\frac{1}{24}+\frac{13}{84}-\frac{15}{112}=\frac{7}{168}+\frac{26}{168}-\frac{15}{112}=\frac{11}{56}-\frac{15}{112}=\frac{22}{112}-\frac{15}{112}=\frac{7}{112}=\frac{1}{16}\)
Cách thuân tiện nè:
M = ( 9/40 - 11/60) + 13/84-15/112
M=( 27/120-22/120) + 13/84 - 15/112
M = 1/24 + 13/84 - 15/112
M= ( 1/24 + 13/84) - 15/112
M = (7/168 + 26/168) - 15/112
M = 33/168 - 15/112
M = 11/56 - 15/112
M = 22/112 - 15/112
M = 7/112
tinh
M=9/40-11/60+13/84-15/112
(giai bang cach thuan tien)
tinh m
M=9/40-11/60+13/84-15/112
M=9/40-11/60+13/84-15/112=1/16
nhớ k cho mình nha
tinh gia tri cua bieu thuc 9/40-11/60+13/84-15/112
\(\frac{9}{40}\) - \(\frac{11}{60}\) + \(\frac{13}{84}\) - \(\frac{15}{112}\)
= \(\frac{1}{24}\) + \(\frac{13}{84}\) - \(\frac{15}{112}\)
= \(\frac{11}{56}\) - \(\frac{15}{112}\)
= \(\frac{1}{16}\)
M=9/40-11/60+13/84-15/112
tinh bang cach thuan tien
p=3/2-5/6+7/12-9/20+11/30-13/42+15/56-17/72
ai giai tui tich
bn ơi hình như sai đề rồi , số cuối cùng là 17/72
M=9/40-11/60+13/84-15/112
Thực hiện phép tính : M = \(\dfrac{9}{40}-\dfrac{11}{60}+\dfrac{13}{84}-\dfrac{15}{112}\)
Ta có: \(M=\dfrac{9}{40}-\dfrac{11}{60}+\dfrac{13}{84}-\dfrac{15}{112}\)
\(=\dfrac{378}{1680}-\dfrac{308}{1680}+\dfrac{260}{1680}-\dfrac{225}{1680}\)
\(=\dfrac{105}{1680}=\dfrac{1}{16}\)
Thực hiện phép tính sau:
M= 9/40- 11/60+ 13/84 - 15/112