问题
解答题
直接写出结果: ①(-2.2)+(+4.9)=______; ②0-(-11.9)=______; ③(-
④|-3|-(-1)=______; ⑤(-
⑥
|
答案
①(-2.2)+(+4.9)=2.7;
②0-(-11.9)=11.9;
③(-
)-(-1 3
)=-1 2
+1 3
=1 2
;1 6
④|-3|-(-1)=3+1=4;
⑤(-
)÷(-2)=-1 2
×(-1 2
)=1 2
;1 4
⑥
+3 0.001
=0.1+0.1=0.2.0.01
故答案为:2.7,11.9,
,4,1 6
,0.2.1 4