问题
解答题
一步一步地计算.
720÷3÷4
98-108÷9
568÷(2×4)
217÷7×9
(315+430)÷5
819÷(100一91)
答案
(1)720÷3÷4,
=240÷4,
=60;
(2)98-108÷9,
=98-12,
=86;
(3)568÷(2×4),
=568÷8,
=71;
(4)217÷7×9,
=31×9,
=279;
(5)(315+430)÷5,
=745÷5,
=149;
(6)819÷(100一91),
=819÷9,
=91.