Tính nhanh : a) 2/3* 66/100+2/3*35/100 – 2/3= 04/09/2021 Bởi Gabriella Tính nhanh : a) 2/3* 66/100+2/3*35/100 – 2/3=
2/3 . 66/100 + 2/3 . 35/100 -2/3 = 2/3 . 66/100 + 2/3 . 35/100 – 2/3 . 1 = 2/3 . (66/100 + 35/100 – 1) = 2/3 . 1 = 2/3 Bình luận
2/3 × 66/100 + 2/3 × 35/100 -2/3 = 2/3 × ( 66/100 + 35/100 – 1 ) = 2/3 × 1/100 = 2/300 = 1/150. Bình luận
2/3 . 66/100 + 2/3 . 35/100 -2/3
= 2/3 . 66/100 + 2/3 . 35/100 – 2/3 . 1
= 2/3 . (66/100 + 35/100 – 1)
= 2/3 . 1 = 2/3
2/3 × 66/100 + 2/3 × 35/100 -2/3
= 2/3 × ( 66/100 + 35/100 – 1 )
= 2/3 × 1/100
= 2/300
= 1/150.