口算高速直达57+12=512+112=0.32=45+2=23+15-23+15=34-0.25=73+23=12.5×8=2-57-27=78-29+18=-数学

题目简介

口算高速直达57+12=512+112=0.32=45+2=23+15-23+15=34-0.25=73+23=12.5×8=2-57-27=78-29+18=-数学

题目详情

口算高速直达
5
7
+
1
2
=
5
12
+
1
12
=
0.32=
4
5
+2=
2
3
+
1
5
-
2
3
+
1
5
=
3
4
-0.25=
7
3
+
2
3
=
12.5×8=2-
5
7
-
2
7
=
7
8
-
2
9
+
1
8
=
题型:解答题难度:中档来源:不详

答案

class="stub"5
7
+class="stub"1
2
=class="stub"17
14
class="stub"5
12
+class="stub"1
12
=class="stub"1
2
0.32=0.09,class="stub"4
5
+2=2class="stub"4
5
class="stub"2
3
+class="stub"1
5
-class="stub"2
3
+class="stub"1
5
=class="stub"2
5
class="stub"3
4
-0.25=0.5,
class="stub"7
3
+class="stub"2
3
=3,
12.5×8=100,2-class="stub"5
7
-class="stub"2
7
=1,
class="stub"7
8
-class="stub"2
9
+class="stub"1
8
=class="stub"7
9

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