问题
解答题
|
答案
(1)8470-104×65
=8470-6760
=1710;
(2)168.1÷(4.3×2-0.4)
=168.1÷(8.6-0.4)
=168.1÷8.2.
=20.5;
(3)3.64÷4+4.36×0.25
=0.91+1.09
=2;
(4)78×199
=78×(200-1)
=78×200-78×1
=15600-78
=15522;
(5)50×32×125
=50×(4×8)×125
=(50×4)×(8×125)
=200×1000
=200000;
(6)(
-1 9
)×4×91 12
=
×4×9-1 9
×4×91 12
=4-3
=1;
(7)99×99+99
=99×(99+1)
=99×100
=9900;
(8)1.3-3.79+9.7-6.21
=(1.3+9.7)-(3.79+6.21)
=11-10
=1;
(9)2.4×[(3.6+1.4)÷
]5 6
=2.4×[5÷
]5 6
=2.4×6
=14.4.