脱式计算,能简算的要简算 2 5 ×4× 3 4 3

2024-11-23 08:17:13
推荐回答(1个)
回答1:


(1)
2
5
×4×
3
4

=
2
5
×(4×
3
4
),
=
2
5
×3,
=
6
5


(2)
3
8
×7+
3
8

=
3
8
×(7+1),
=
3
8
×8,
=3;

(3)55×
6
11
-32×
1
4

=30-8,
=22;

(4)0.125×32×2.5,
=0.125×(4×8)×2.5,
=(0.125×8)×(4×2.5),
=1×10,
=10;

(5)99.9+0.12+0.1+0.88,
=(99.9+0.1)+(0.12+0.88),
=100+1,
=101;

(6)9+99+999+9×
1
3

=9+99+999+3,
=9+99+999+(1+1+1),
=(9+1)+(99+1)+(999+1),
=10+100+1000,
=1110.