a, 364 - ( 364 - 111 )
= ( 364 - 364 ) + 111
= 0 + 111
= 111
b, 249 - ( 75 - 51 )
= ( 249 + 51 ) - 75
= 300 - 75
= 225
1, Tính nhanh
a,364-(364-111)
364 - 364 + 1110 + 111111b,249-(75-51)
249 - 75 - 51( 249 + 51 ) -75300 - 75225c,100+98+96+..+2-97-95-...-1
= 100 + ( 98 - 97 ) + ( 96 - 95 ) + ...+ ( 2-1)= 100 + 1+1+...1= 100 + 1.49= 100 + 49= 149
1)
a) \(364-\left(364-111\right)\)
\(=364-364+111\)
\(=\left(364-364\right)+111\)
\(=0+111=111\)
b) \(249-\left(75-51\right)\)
\(=249-75+51\)
\(=\left(249+51\right)-75\)
\(=300-75=225\)
c) \(100+98+96+...+2-97-95-....-1\)
\(=100+\left(98-97\right)+\left(96-95\right)+....+\left(2-1\right)\)
\(=100+1.49=149\)
chúc bạn học tốt like mình nha
