tính:
a) 3/8 : 6/5 + 15/8 : 5 =...................................
=...................................
b) 7,99 : 3,4 x 0,25 =.....................................
=.....................................
c) 15,3 - 21,93 : 3,4 =.......................................
=.......................................
a) = 3/8 x 5/6 + 15/8 x 1/5
=5/16 + 3/8
=11/16
b)=2,35 x 0,25
=0,5875
c)= 15,3 - 6,45
=8,85
CHÚC BẠN HỌC TỐT!
a, \(\frac{3}{8}:\frac{6}{5}+\frac{15}{8}:5\)= \(\frac{5}{16}+\frac{3}{8}\)
= \(\frac{11}{16}\)
b,7,99 : 3,4 x 0,25 = 2,35 x 0,25
= 0,5875
c,15,3 - 21,93 : 3,4 = 15,3 - 6,45
= 8,85