(25.2-1.05×4)÷8.4简算
问题描述:
(25.2-1.05×4)÷8.4简算
答
(25.2-1.05×4)÷8.4
=(25.2-4.2)÷8.4
=25.2÷8.4-4.2÷8.4
=3-0.5
=2.5