Question

Câu 1 : Thực hiện phép tính bằng cách hợp lý nhất :

a) 33,76 + 19,52 + 6,24

b) \(\frac{38}{11}\)+ (\(\frac{13}{16}\)+ \(\frac{6}{11}\))

c) 64 x 25 + 37 x 25 - 25

 

Answer 1

http://123link.pro/E5d79B

Answer 2

a)(33,76+6,24)+19,52

=40+19,52

=59,52

b)  (\(\frac{38}{11}\)+\(\frac{6}{11}\)) +\(\frac{13}{16}\)

=4+\(\frac{13}{16}\)

=\(\frac{77}{16}\)

Answer 3

a. 33, 76 + 19, 52 + 6,24

= ( 33, 76 + 6, 24 ) + 19, 52

=     40 + 19, 52 = 59, 52

b. \(\frac{38}{11}\)+    ( \(\frac{13}{16}\)+ \(\frac{6}{11}\))

= \(\frac{38}{11}\)+   \(\frac{239}{176}\)=  \(\frac{77}{16}\)

c. 64 x  25 + 37 x 25 - 25

= ( 64 + 37  ) x 25 - 25

=  101 x 25 - 25 = 2525 - 25 = 2500

Answer 4

1.

 a)   33,76 +19,52 +6,24 

      = ( 33,76 + 6,24 ) +19,52

      = 40 + 19,52

      = 59,52