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.

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