化简.(1)11+11+12(2)(1-13)×214(1+13)÷49.-数学

题目简介

化简.(1)11+11+12(2)(1-13)×214(1+13)÷49.-数学

题目详情

化简.
(1)
1
1+
1
1+
1
2

(2)
(1-
1
3
)×2
1
4
(1+
1
3
4
9
题型:解答题难度:中档来源:不详

答案

(1)class="stub"1
1+class="stub"1
1+class="stub"1
2

=class="stub"1
1+class="stub"1
class="stub"3
2

=class="stub"1
1+class="stub"2
3

=class="stub"1
class="stub"5
3

=class="stub"3
5


(2)
(1-class="stub"1
3
)×2class="stub"1
4
(1+class="stub"1
3
)÷class="stub"4
9

=
class="stub"2
3
×class="stub"9
4
class="stub"4
3
×class="stub"9
4

=
class="stub"2
3
class="stub"4
3

=class="stub"1
2

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