(1) 1.3与的和除以3与的差,商是多少?

2024-11-22 10:57:57
推荐回答(1个)
回答1:

(1)(1.3+

)÷(3-

),
=(1

+

)÷(

-

),
=

÷


=

×


=


答:商是



(2)除数:
[81-5-(5+5)]÷(1+5),
=[81-15]÷6,
=66÷6,
=11;
被除数:
11×5+5=60;  
答:被除数、除数各是60、11.

(3)(2.1+1.2×1

)÷


=(2.1+1.5)÷


=3.6×


=8.1;
答:这个数是8.1.