计算①(+16)+(-30)-(-14) ②-40-25-(-19)+(-24) ③11又1/2-1又3/4-1又1/4+4又1/2

问题描述:

计算①(+16)+(-30)-(-14) ②-40-25-(-19)+(-24) ③11又1/2-1又3/4-1又1/4+4又1/2

(+16)+(-30)-(-14)=16-30+14=0
-40-25-(-19)+(-24)= -40 -25+19-24 = -70
11又1/2-1又3/4-1又1/4+4又1/2 = (11又1/2+4又1/2)-(1又3/4+1又1/4) = 16 - 3 =13