Toán Lớp 5: tính bằng cách thuận tiện nhất
19,96×0,25×4= 5,9×8,6+5,9×1,4 6,34×1,3+3,66×1,3
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 5: tính bằng cách thuận tiện nhất
19,96×0,25×4= 5,9×8,6+5,9×1,4 6,34×1,3+3,66×1,3
Comments ( 2 )
19,96xx0,25xx4=19,96xx1=19,96
5,9xx8,6+5,9xx1,4=5,9xx(8,6+1,4)=5,9xx10=59
6,34xx1,3+3,66xx1,3=(6,34+3,66)xx1,3=10xx1,3=13
@ Tham khảo @
19,96xx0,25xx4
= 19,96xx(0,25xx4)
= 19,96xx1
= 19,96
_____________________________
5,9xx8,6+5,9xx1,4
= 5,9xx(8,6+1,4)
= 5,9xx10
= 59
_______________________________
6,34xx1,3+3,66xx1,3
= 1,3xx(6,34+3,66)
= 1,3xx10
= 13
#Jo