问题 解答题

计算:

(1)1.6-(-2.5);

(2)0.4-1;

(3)(-3.8)-7;

(4)(-5.9)-(-6.1);

(5)(-2.3)-3.6;

(6)4.2-5.7;

(7)(-3.71)-(-1.45);

(8)6.18-(-2.93).

答案

(1)1.6-(-2.5)=1.6+2.5=4.1;

(2)0.4-1=0.4+(-1)=-0.6;

(3)(-3.8)-7=(-3.8)+(-7)=-10.8;

(4)(-5.9)-(-6.1)=(-5.9)+6.1=0.2;

(5)(-2.3)-3.6=(-2.3)+(-3.6)=-5.9;

(6)4.2-5.7=4.2+(-5.7)=-1.5;

(7)(-3.71)-(-1.45)=(-3.71)+1.45=-2.26;

(8)6.18-(-2.93)=6.18+2.93=9.11.

选择题
单项选择题 A3/A4型题