问题
解答题
用你喜欢的方法计算.
1000-25×16+98
34×21+166×21
48×(129+56)-345
(85+79)×(85-79)
968-(118×24-1890)
156×37-56×37.
答案
(1)1000-25×16+98,
=1000-25×4×4+98,
=1000-400+98,
=698;
(2)34×21+166×21,
=(34+166)×21,
=200×21,
=4200;
(3)48×(129+56)-345,
=48×185-345,
=8880-345,
=8535;
(4)(85+79)×(85-79),
=164×6,
=984;
(5)968-(118×24-1890),
=968-(2832-1890),
=968-942,
=26;
(6)156×37-56×37,
=(156-56)×37,
=100×37,
=3700.