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a) 576+ 168+ 124+ 132
= (576 +124) + (168+ 132)
= 700 + 300
= 1000
a)576+168+124+132
=(576+124)+(168+132)
=700+300
=1000
b)2377+7969+623-969
=(2377+623)+(7969-969)
=3000+7000
=10000
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96 + 78 + 4 677 + 969 + 123 + 31
=( 96 + 4 ) + 78 = ( 677 + 123 ) + ( 969 + 31 )
= 100 + 78 = 800 + 1000
= 178 = 1800
k cho mình nha!
96+78+4 677+969+123+31
(96+4)+78 (677+123)+(969+31)
100+78 800 +1000
178 1800
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a) 96 + 78 + 4 = 96 + 4 + 78 = 100 + 78 = 178
67 + 21 + 79 = 67 + 100 = 167
408 + 85 + 92 = 405 + 92 + 85 = 500 + 85 = 585
b) 789 + 285 + 15 = 789 + 300 = 1089
448 + 594 + 52 = 448 + 52 + 594 = 500 + 594 = 1094
677 + 969 + 123 = 677 + 123 + 969 = 1769
a) 96 + 78 + 4 = 96 + 4 + 78 = 100 + 78 = 178
67 + 21 + 79 = 67 + 100 = 167
408 + 85 + 92 = 405 + 92 + 85 = 500 + 85 = 585
b) 789 + 285 + 15 = 789 + 300 = 1089
448 + 594 + 52 = 448 + 52 + 594 = 500 + 594 = 1094
677 + 969 + 123 = 677 + 123 + 969 = 1769
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a) 1 969, 1 970, 1 971, 1 972, 1 973, 1 974, 1 975.
b) 2, 4, 6, 8, 10, 12, 14.
c) 1, 3, 5, 7, 9, 11, 13, 15.
d) 5, 10, 15, 20, 25, 30, 35, 40.