问题
解答题
小神算.
|
答案
(1)25×12+35×40
=300+1400
=1700;
(2)(121-38)×15-840
=83×15-840
=1245-840
=405;
(3)97+(680-120×3)
=97+(680-360)
=97+320
=417;
(4)1800-54×27+150
=1800-1458+150
=342+150
=492.
小神算.
|
(1)25×12+35×40
=300+1400
=1700;
(2)(121-38)×15-840
=83×15-840
=1245-840
=405;
(3)97+(680-120×3)
=97+(680-360)
=97+320
=417;
(4)1800-54×27+150
=1800-1458+150
=342+150
=492.