递等式计算(能简便就要简便)①78+512-16②11126-1113-213+226③3227-(527+716)④10-29-39⑤59-(56-712)⑥35+127+0.4-27.-数学

题目简介

递等式计算(能简便就要简便)①78+512-16②11126-1113-213+226③3227-(527+716)④10-29-39⑤59-(56-712)⑥35+127+0.4-27.-数学

题目详情

递等式计算(能简便就要简便)
7
8
+
5
12
-
1
6
②1
11
26
-
11
13
-
2
13
+
2
26
32
27
-(
5
27
+
7
16
④10-
2
9
-
3
9
5
9
-(
5
6
-
7
12
3
5
+1
2
7
+0.4-
2
7
题型:解答题难度:中档来源:不详

答案

class="stub"7
8
+class="stub"5
12
-class="stub"1
6

=24×(class="stub"7
8
+class="stub"5
12
-class="stub"1
6
)÷24,
=(24×class="stub"7
8
+24×class="stub"5
12
-24×class="stub"1
6
)÷24,
=(21+10-4)÷24,
=27÷24,
=class="stub"9
8

=1class="stub"1
8


②1class="stub"11
26
-class="stub"11
13
-class="stub"2
13
+class="stub"2
26

=(1class="stub"11
26
+class="stub"2
26
)-(class="stub"11
13
+class="stub"2
13
),
=1.5-1,
=0.5;

class="stub"32
27
-(class="stub"5
27
+class="stub"7
16
),
=class="stub"32
27
-class="stub"5
27
-class="stub"7
16

=1-class="stub"7
16

=class="stub"9
16


④10-class="stub"2
9
-class="stub"3
9

=10-(class="stub"2
9
+class="stub"3
9
),
=10-class="stub"5
9

=9class="stub"4
9


class="stub"5
9
-(class="stub"5
6
-class="stub"7
12
),
=36×[class="stub"5
9
-(class="stub"5
6
-class="stub"7
12
)]÷36,
=[36×class="stub"5
9
-36×(class="stub"5
6
-class="stub"7
12
)]÷36,
=[20-(30-21)]÷36,
=[20-9]÷36,
=11÷36,
=class="stub"11
36


class="stub"3
5
+1class="stub"2
7
+0.4-class="stub"2
7

=(class="stub"3
5
+0.4)+(1class="stub"2
7
-class="stub"2
7
),
=1+1,
=2.

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