a) X × 17,7 – 7,7 × X = 177 b) 1.5+2.5+3.5+4.5+5.5+6.5+7.5+8.5 20/10/2021 Bởi Brielle a) X × 17,7 – 7,7 × X = 177 b) 1.5+2.5+3.5+4.5+5.5+6.5+7.5+8.5
a) X x 17,7 – 7,7 x X = 177 => X x ( 17,7 – 7,7 ) = 177 => X x 10 = 177 => X = 177 : 10 => X = 17,7 b)1.5+2.5+3.5+4.5+5.5+6.5+7.5+8.5 = 5 x (1+2+3-4+5+6+7+8)=5 x 28= 140 Bình luận
a) X x 17,7 – 7,7 x X = 177
=> X x ( 17,7 – 7,7 ) = 177
=> X x 10 = 177
=> X = 177 : 10
=> X = 17,7
b)1.5+2.5+3.5+4.5+5.5+6.5+7.5+8.5
= 5 x (1+2+3-4+5+6+7+8)
=5 x 28
= 140
b) 1.5+2.5+3.5+4.5+5.5+6.5+7.5+8.5= ..36..