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脱式计算 (1)1655-45×140÷18= (2)0.63+37%÷(223+149)= (3)49×[34-(716-14)]=

编辑:chaxungu时间:2026-04-27 13:21:23分类:小学数学题库

脱式计算
(1)1655-45×140÷18=(2)0.63+37%÷(2
2
3
+1
4
9
)=
(3)
4
9
×[
3
4
-(
7
16
-
1
4
)]=
(1)1655-45×140÷18,
=1655-6300÷18,
=1655-350,
=1305;

(2)0.63+37%÷(2
2
3
+1
4
9
),
=0.63+37%÷
37
9
,
=0.63+
9
100
,
=0.72;

(3)
4
9
×[
3
4
-(
7
16
-
1
4
)],
=
4
9
×[
3
4
-
3
16
],
=
4
9
×
9
16
,
=
1
4
.