脱式计算①907×99×907②(45+14)÷73+710③(0.125×8-0.5)×4④[1-(12-14)]×23.-数学

题目简介

脱式计算①907×99×907②(45+14)÷73+710③(0.125×8-0.5)×4④[1-(12-14)]×23.-数学

题目详情

脱式计算
①907×99×907
②(
4
5
+
1
4
)÷
7
3
+
7
10

③(0.125×8-0.5)×4
④[1-(
1
2
-
1
4
)]×
2
3
题型:解答题难度:中档来源:不详

答案

①907×99×907
=89793×907
=81442251;
②(class="stub"4
5
+class="stub"1
4
)÷class="stub"7
3
+class="stub"7
10

=class="stub"21
20
×class="stub"3
7
+class="stub"7
10

=class="stub"9
20
+class="stub"14
20

=1class="stub"3
20

③(0.125×8-0.5)×4
=(1-0.5)×4
=0.5×4
=2;
④[1-(class="stub"1
2
-class="stub"1
4
)]×class="stub"2
3

={1-class="stub"1
4
class="stub"2
3

=class="stub"3
4
×class="stub"2
3

=class="stub"1
2

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