题目内容
小神算.
| 25×12+35×40 | (121-38)×15-840 | 97+(680-120×3) | 1800-54×27+150. |
(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.
=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.
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