(1)314+314=______;(2)279-179=______.-数学

题目简介

(1)314+314=______;(2)279-179=______.-数学

题目详情

(1)3
1
4
+3
1
4
=______;
(2)2
7
9
-1
7
9
=______.
题型:填空题难度:中档来源:不详

答案


(1)3class="stub"1
4
+3class="stub"1
4

=(3+class="stub"1
4
)+(3+class="stub"1
4

=(3+3)+(class="stub"1
4
+class="stub"1
4

=6+class="stub"1
2

=6class="stub"1
2


(2)2class="stub"7
9
-1class="stub"7
9

=(2+class="stub"7
9
)-(1+class="stub"7
9
),
=(2-1)+(class="stub"7
9
-class="stub"7
9
),
=1.
故答案为:6class="stub"1
2
,1.

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