题目内容
脱式计算.
| 500-125×3 | (300+125)×4 | (2500-400)÷3 |
| 800-300÷5 | 25×8×6 | 207×3-521. |
(1)500-125×3,
=500-375,
=125;
(2)(300+125)×4,
=300×4+125×4,
=1200+500,
=1700;
(3)(2500-400)÷3,
=2100÷3,
=700;
(4)800-300÷5,
=800-60,
=720;
(5)25×8×6,
=200×6,
=1200;
(6)207×3-521,
=621-521,
=100.
=500-375,
=125;
(2)(300+125)×4,
=300×4+125×4,
=1200+500,
=1700;
(3)(2500-400)÷3,
=2100÷3,
=700;
(4)800-300÷5,
=800-60,
=720;
(5)25×8×6,
=200×6,
=1200;
(6)207×3-521,
=621-521,
=100.
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