Toán Lớp 6: gấp gấp ạa
4. tính hợp lí ( nếu có )
a. 42 – ( – 27 )
b.( – 48 ) – 16
c. ( – 37 ) – ( – 25 )
e. ( – 351 ) – [ ( 649 + 125 ) – 25 ]
f. ( – 32 ) . 68 – 32 . 13 + 81 . ( – 68 )
Leave a reply
Register Now
Login
Lost Password
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Toán Lớp 6: gấp gấp ạa
4. tính hợp lí ( nếu có )
a. 42 – ( – 27 )
b.( – 48 ) – 16
c. ( – 37 ) – ( – 25 )
e. ( – 351 ) – [ ( 649 + 125 ) – 25 ]
f. ( – 32 ) . 68 – 32 . 13 + 81 . ( – 68 )
Comments ( 2 )
42+27
= 69
b)( – 48 ) – 16
=-(48+16)
= -64
c) ( – 37 ) – ( – 25 )
=-37+25
= -12
e) ( – 351 ) – [ ( 649 + 125 ) – 25 ]
=( – 351 ) – [ 649 + 125 – 25 ]
= – 351 – 749
=-(351+749)
=-1100
f) ( – 32 ) . 68 – 32 . 13 + 81 . ( – 68)
=-32. (68 – 13) + 81 . ( – 68)
= -32 .55 + 81 . ( – 68)
= -1760 + (-5508)
=-(1760+5508)
=-7268