问题
解答题
脱式计算
7.5×24+22÷0.4. |
答案
①
÷(5 8
÷3 5
-1),4 15
=
÷(5 8
×3 5
-1),15 4
=
÷5 8
,5 4
=
×5 8
,4 5
=
;1 2
②7.5×24+22÷0.4,
=(7.5×2)×12+22÷
,2 5
=15×12+22×
,5 2
=180+55,
=235.
脱式计算
7.5×24+22÷0.4. |
①
÷(5 8
÷3 5
-1),4 15
=
÷(5 8
×3 5
-1),15 4
=
÷5 8
,5 4
=
×5 8
,4 5
=
;1 2
②7.5×24+22÷0.4,
=(7.5×2)×12+22÷
,2 5
=15×12+22×
,5 2
=180+55,
=235.