问题
解答题
125×(107×80)
854-54-47
47×65+35×47
32×125
720÷2÷9
422×87+13×422.
答案
(1)125×(107×80),
=(125×80)×107,
=10000×107,
=1070000;
(2)854-54-47,
=(854-54)-47,
=800-47,
=753;
(3)47×65+35×47,
=47×(65+35),
=47×100,
=4700;
(4)32×125,
=(4×8)×125,
=4×(8×125),
=4×1000,
=4000;
(5)720÷2÷9,
=720÷9÷2,
=80÷2,
=40;
(6)422×87+13×422,
=422×(87+13),
=422×100,
=42200.