问题
解答题
列式计算. (1)42的
(2)1
|
答案
(1)(42×
-20)÷46 7
=(36-20)÷4
=16÷4
=4;
(2)(1
×2+0.4)÷25%3 5
=(3.2+0.4)÷0.25
=3.6÷0.25
=14.4.
答:(1)商是4,(2)这个数是14.4.
列式计算. (1)42的
(2)1
|
(1)(42×
-20)÷46 7
=(36-20)÷4
=16÷4
=4;
(2)(1
×2+0.4)÷25%3 5
=(3.2+0.4)÷0.25
=3.6÷0.25
=14.4.
答:(1)商是4,(2)这个数是14.4.