Question

有理数的加减混合运算20道题只要20道咯,各位想想办法,帮我凑上!

Answer 1

(1)-1+2-3+4-5+6-7; (2)-50-28+(-24)-(-22); (3)-19.8-(-20.3)-(+20.2)-10.8; (4)0.25- +(-1 )-(+3 ). (5)-5.7+(-9)-1 (6)3.6-(-2.4)+5.5 哥哥我,先送你6道!