2.1×(3+9.728÷3.2)怎么简便运算?

2025-06-28 04:05:32
推荐回答(2个)
回答1:

2.1×(3+9.728÷3.2)
=2.1×(3+9.728÷4÷4÷0.02)
=2.1×(3+2.432÷4÷0.02)
=2.1ⅹ(3+0.608÷0.02)
=2.1ⅹ(3+3O.4)
=2.1ⅹ33.4
=(2+0.1)x33.4
=66.8+3.34
=70.14

回答2:

2.1x(3+9.728÷3.2)
=2.1x(3+3.04)
=2.1x6.04
=12.684