计算:①-75+(+110)②90-(-3)③-0.5-(-314)+2.75-(+712)④(-479)-(-316)-(+229)+(-616).-数学

题目简介

计算:①-75+(+110)②90-(-3)③-0.5-(-314)+2.75-(+712)④(-479)-(-316)-(+229)+(-616).-数学

题目详情

计算:
①-
7
5
+(+
1
10
)              
②90-(-3)
③-0.5-(-3
1
4
)+2.75-(+7
1
2
)   
(-4
7
9
)-(-3
1
6
)-(+2
2
9
)+(-6
1
6
)
题型:解答题难度:中档来源:不详

答案

①-class="stub"7
5
+(+class="stub"1
10
)=-1.3;              

②90-(-3)=93;

③-0.5-(-3class="stub"1
4
)+2.75-(+7class="stub"1
2
)   
=(-0.5-7.5)+(3class="stub"1
4
+2.75)
=-8+6
=-2;

(-4class="stub"7
9
)-(-3class="stub"1
6
)-(+2class="stub"2
9
)+(-6class="stub"1
6
)

=(-4class="stub"7
9
-2class="stub"2
9
)+(3class="stub"1
6
-6class="stub"1
6

=-7-3
=-10.

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