脱式计算(能用简便方法计算的要用简便方法).17.5-4.25-5.751.68÷(2.4×2-4.6) 9 36 ÷[

2024-11-30 00:47:43
推荐回答(1个)
回答1:

(1)17.5-4.25-5.75
=17.5-(4.25+5.75)
=17.5-10
=7.5;

(2)1.68÷(2.4×2-4.6)
=1.68÷(4.8-4.6)
=1.68÷0.2
=8.4;

(3)
9
36
÷[
3
4
-(
7
16
-
1
4
)]
=
9
36
÷[
3
4
-
3
16
]

=
9
36
÷
9
16

=
9
36
×
16
9

=
4
9