如题所述
第1个回答 2021-03-24
19+43+98+51-15
=(20-1)+(40+3)+(100-2)+(50+1)-(20-5)
=20-1+40+3+100-2+50+1-20+5
=100+(20-20+50+40)+(1-1+3-2+5)
=100+90+6
=190+6
=196
=(20-1)+(40+3)+(100-2)+(50+1)-(20-5)
=20-1+40+3+100-2+50+1-20+5
=100+(20-20+50+40)+(1-1+3-2+5)
=100+90+6
=190+6
=196
第2个回答 2021-03-24
19+43+98+51-15
=(19+51)+43+(98-15)
=70+43+83
=196
=(19+51)+43+(98-15)
=70+43+83
=196
第3个回答 2021-03-24
19+43+98+51-15
=(19+51)+(42+1+98)-15
=70+140+1-15
=(70-15)+140+1
=55+140+1
=196
或者是
19+43+98+51-15
=(19-15)+(40+3)+(100-2)+(50+1)
=4+40+3+100-2+50+1
=(40+100+50)+(4+3-2+1)
=190+6
=196
=(19+51)+(42+1+98)-15
=70+140+1-15
=(70-15)+140+1
=55+140+1
=196
或者是
19+43+98+51-15
=(19-15)+(40+3)+(100-2)+(50+1)
=4+40+3+100-2+50+1
=(40+100+50)+(4+3-2+1)
=190+6
=196