求七十道正负数加减混合运算题(附答案)
2025-10-08
1.0-21又2/3+(+3又1/4)—(—2/3)—(+1/4) 2.(+16)+(-29)-(-7)-(+11)+(+9) 3.(-3.1)-(-4.5)+(+4.4)-(+1.3)+(-2.5) 4.(-5)-(-8)+(-15)-(+11) 5.(+16)-(+25)-(-24)+(+23) 6.2.5-(-3.6)-6.5+(-7) 7.163-(-41)-63-(-259) 8...
2025-10-08
1.0-21又2/3+(+3又1/4)—(—2/3)—(+1/4) 2.(+16)+(-29)-(-7)-(+11)+(+9) 3.(-3.1)-(-4.5)+(+4.4)-(+1.3)+(-2.5) 4.(-5)-(-8)+(-15)-(+11) 5.(+16)-(+25)-(-24)+(+23) 6.2.5-(-3.6)-6.5+(-7) 7.163-(-41)-63-(-259) 8...