问题
解答题
脱式计算,能简便要简便计算.
|
答案
(1)42×5÷7
=42÷7×5
=6×5
=30;
(2)897-120×3
=897-360
=537;
(3)(37+25)÷2
=62÷2
=31;
(4)725÷5÷5
=145÷5
=29;
(5)128+344÷4
=128+86
=214;
(6)306÷(3×3)
=306÷9
=34.
脱式计算,能简便要简便计算.
|
(1)42×5÷7
=42÷7×5
=6×5
=30;
(2)897-120×3
=897-360
=537;
(3)(37+25)÷2
=62÷2
=31;
(4)725÷5÷5
=145÷5
=29;
(5)128+344÷4
=128+86
=214;
(6)306÷(3×3)
=306÷9
=34.