怎样算简便就怎样算.①520+2613÷13②29×5×920③(45+14)÷75+14④(23+47-16)÷142⑤711÷62.5%+411×85.-数学

题目简介

怎样算简便就怎样算.①520+2613÷13②29×5×920③(45+14)÷75+14④(23+47-16)÷142⑤711÷62.5%+411×85.-数学

题目详情

怎样算简便就怎样算.
①520+2613÷13
2
9
×5×
9
20

③(
4
5
+
1
4
)÷
7
5
+
1
4

④(
2
3
+
4
7
-
1
6
)÷
1
42

7
11
÷62.5%+
4
11
×
8
5
题型:解答题难度:中档来源:不详

答案

①520+2613÷13,
=520+201,
=721;

class="stub"2
9
×5×class="stub"9
20

=class="stub"2
9
×class="stub"9
20
×5,
=class="stub"1
10
×5,
=class="stub"1
2


③(class="stub"4
5
+class="stub"1
4
)÷class="stub"7
5
+class="stub"1
4

=class="stub"21
20
÷class="stub"7
5
+class="stub"1
4

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

=1;

④(class="stub"2
3
+class="stub"4
7
-class="stub"1
6
)÷class="stub"1
42

=(class="stub"2
3
+class="stub"4
7
-class="stub"1
6
)×42,
=class="stub"2
3
×42+class="stub"4
7
×42-class="stub"1
6
×42,
=28+24-7,
=52-7,
=45;

class="stub"7
11
÷62.5%+class="stub"4
11
×class="stub"8
5

=class="stub"7
11
×class="stub"8
5
+class="stub"4
11
×class="stub"8
5

=(class="stub"7
11
+class="stub"4
11
)×class="stub"8
5

=1×class="stub"8
5

=class="stub"8
5

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