问题
解答题
先在□里填上适当的数,再简便计算.
(1)502×□-16×2
(2)736-169-□
答案
(1)在算式502×□-16×2的□里填上16可得:
502×16-16×2
=(502-2)×16,
=500×16,
=8000;
(2)在算式736-169-□填上31后可得:
736-169-31
=736-(169+31),
=736-200,
=536.
先在□里填上适当的数,再简便计算.
(1)502×□-16×2
(2)736-169-□
(1)在算式502×□-16×2的□里填上16可得:
502×16-16×2
=(502-2)×16,
=500×16,
=8000;
(2)在算式736-169-□填上31后可得:
736-169-31
=736-(169+31),
=736-200,
=536.