98+3+97+2=(98+2)+(97+3)
=100+100=200
56+399+1+4=(56+4)+(399+1)
=60+400
=460
364+136+219+181=(364+136)+(219+181)
=500+400=900
178+277+123+422=(178+422)+(277+123)
600+400=1000
98+3+97+2=(98+2)+(97+3)=100+100=200
56+399+1+4=(56+4)+(399+1)=60+400=460
364+136+219+181=(364+136)+(219+181)=500+400=900
178+277+123+422=(178+422)+(277+123)=600+400=1000
98 + 3 + 97 + 2 = ( 98 + 2 ) + ( 97 + 3 )
= 100 + 100 = 200
56 + 399 + 1 + 4 = ( 56 + 4 ) + ( 399 + 1 )
= 100 + 400 = 500
364 + 136 + 219 + 181 = ( 364 + 136 ) + ( 219 + 181 )
= 500 + 400 = 900
178 + 277 + 123 + 422 = ( 178 + 422 ) + ( 277 + 123 )
= 600 + 400 = 1 000
sorry mình nhầm :
98+ 3+ 97+ 2= ( 98 + 2 ) + ( 97 + 3)
= 100 + 100
= 200
56+ 399+ 1+ 4 = ( 56 + 4 ) + ( 399 + 1 )
= 60 + 400
= 460
364+ 136+ 219+ 181 = ( 364 + 136 ) + ( 219 + 181 )
= 500 + 400
= 900
178+277+123+422=( 178+422 )+( 277+123)
= 600 + 400
= 1 000