0,125 bằng bao nhiêu
0,125 bằng bao nhiêu
a)0,75−56+112;0,75−56+112;
b)37+415+(−821)+(−0,4);37+415+(−821)+(−0,4);
c)0,625+(−27)+38+(−57)+1230,625+(−27)+38+(−57)+123
d)(−3).(−3821).(−76).(−319);(−3).(−3821).(−76).(−319);
e) (1118:229).85;(1118:229).85;
g)[(−45).58]:(−2512)[(−45).58]:(−2512)
a: =0,75+56=56,75
b: =37+415-821-0,4=-369,4
c: =38,625-74=-35,375
e: 1118*229/85=256022/85
f: =2610/2512=1305/1256
số hữu tỉ 7/10 được viết dưới dạng tổng của hai số hữu tỉ dương trong đó có một số bằng 1/4là
.
(-52) 66-(48-34)
-(2021.0,7+19,75)+2021.0,7-(8-19,75)
\(=-2021\cdot0.7-19.75+2021\cdot0.7-8+19.75\)
=-8
(8+2\(\dfrac{1}{3}\) - 3/5) - (5+0,4)-(3\(\dfrac{1}{3}\)-2)
\(\left(8+2\dfrac{1}{3}-\dfrac{3}{5}\right)-\left(5+0,4\right)-\left(3\dfrac{1}{3}-2\right)\)
\(\left(8+\dfrac{7}{3}-\dfrac{3}{5}\right)-\left(5+\dfrac{2}{5}\right)-\left(\dfrac{10}{3}-2\right)\)
\(=\dfrac{120+35-9}{15}-\dfrac{25+2}{5}-\dfrac{10-6}{3}\)
\(=\dfrac{146}{15}-\dfrac{27}{5}-\dfrac{4}{3}\)
\(=\dfrac{146}{15}-\dfrac{81}{15}-\dfrac{20}{15}\)
\(=\dfrac{146-81-20}{15}=\dfrac{45}{15}=3\)