列式计算(1)79比47的34多多少?(2)一个数的15比它的14少1.2,求这个数.(3)3.5加上12.5的和乘以0.3

2025-03-13 11:19:35
推荐回答(1个)
回答1:

(1)
7
9
-
4
7
×
3
4

=
7
9
-
3
7

=
22
63


(2)1.2÷(
1
4
-
1
5
),
=1.2÷
1
20

=1.2×20,
=24;

(3)0.96÷[(3.5+12.5)×0.3],
=0.96÷[16×0.3],
=0.96÷4.8,
=0.2.