Toán Lớp 6: 2 . [ 3 – 9 : (-3) + 2 . (5 – 7)] – 18 : (-9)
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Toán Lớp 6: 2 . [ 3 – 9 : (-3) + 2 . (5 – 7)] – 18 : (-9)
Comments ( 2 )
2. [ 3 – 9 : ( -3 ) + 2. ( 5 – 7 ) ] – 18 : ( -9 )
= 2. [ 3 – ( -3 ) + 2. ( -2 ) ] – ( -2 )
= 2. [ 3 + 3 – 4 ] + 2
= 2. 2 + 2
= 4 + 2
= 6
2 . [ 3 – 9 : ( -3 ) + 2 . ( 5 – 7 ) ] – 18 : ( -9 )
= 2 . [ 3 – ( -3 ) + 2 . ( -2 ) ] – ( -2 )
= 2 . [ 3 + 3 – 4 ] + 2
= 2 . 2 + 2
= 4 + 2
= 6