Toán Lớp 6: a) 17 : 7/12 + 17 : 7/2
b) 20 . 24 + 20 . 76
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Toán Lớp 6: a) 17 : 7/12 + 17 : 7/2
b) 20 . 24 + 20 . 76
Comments ( 2 )
a) 17 : 7/12 + 17 : 7/2
=> 17 . 12/7 + 17 . 2/7
=> 17 . (12/7 + 2/7)
=> 17 . 2
= 34
b) 20 . 24 + 20 . 76
=> 20 . (24+76)
=> 20 . 100
= 2000
a,
17:7/12+17:7/2
=17 . 12/7+17 . 2/7
=17 . (12/7+2/7)
=17 . ((12+2)/7)
=17 . 14/7
=17 . 2
=34
b,
20.24+20.76
=20 . (24+76)
=20 . 100
=2000