计算下面各题(能简算的要简算)①0.25×37+14+62÷4②(34+56-1112)÷12③1.21×42-(4.46+750)④3.5÷[1.4×(0.1-0.05)-数学

题目简介

计算下面各题(能简算的要简算)①0.25×37+14+62÷4②(34+56-1112)÷12③1.21×42-(4.46+750)④3.5÷[1.4×(0.1-0.05)-数学

题目详情

计算下面各题(能简算的要简算)
①0.25×37+
1
4
+62÷4
②(
3
4
+
5
6
-
11
12
)÷12
③1.21×42-(4.46+
7
50

④3.5÷[1.4×(0.1-0.05)
题型:解答题难度:中档来源:不详

答案

①0.25×37+class="stub"1
4
+62÷4,
=class="stub"1
4
×37+class="stub"1
4
×1+62×class="stub"1
4

=(37+1+62)×class="stub"1
4

=100×class="stub"1
4

=25;

②(class="stub"3
4
+class="stub"5
6
-class="stub"11
12
)÷12,
=(class="stub"19
12
-class="stub"11
12
)÷12,
=class="stub"8
12
÷12,
=class="stub"1
18


③1.21×42-(4.46+class="stub"7
50
),
=1.21×42-4.6,
=50.82-4.6,
=46.22;

④3.5÷[1.4×(0.1-0.05)],
=3.5÷[1.4×0.05],
=3.5÷0.07,
=50.

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