题目内容

(1)240×50%=
(2)6.25:
5
24
=
(3)5-4÷
4
5
=
(4)21×
1
3
-0.375÷
1
8
=
(5)0.75÷0.15-0.375×
4
5
=
(6)10×3
5
6
÷3
5
6
×10
=
(7)1.25×99.99×0.4×8×2.5=
(8)2
1
3
×12.5×
6
7
×8
=
(1)240×50%=120;
(2)6.25:
5
24
=30;
(3)5-4÷
4
5

=5-5,
=0;

(4)21×
1
3
-0.375÷
1
8

=7-3,
=4;

(5)0.75÷0.15-0.375×
4
5

=5-0.3,
=4.7;

(6)10×3
5
6
÷3
5
6
×10

=3
5
6
÷3
5
6
×10×10,
=1×10×10,
=100;

(7)1.25×99.99×0.4×8×2.5
=(1.25×8)×(0.4×2.5)×99.99,
=10×1×99.99,
=999.9;

(8)2
1
3
×12.5×
6
7
×8

=
7
3
×
6
7
×(12.5×8),
=1×100,
=100.
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