题目内容
| 递等式计算 (56-48)×200 | 280+310×3 | 540-70×7 |
| 78-72÷8 | 6×(550-350) | 120×4+720. |
(1)(56-48)×200,
=8×200,
=1600;
(2)280+310×3,
=280+930,
=1210;
(3)540-70×7,
=540-490,
=50;
(4)78-72÷8,
=78-9,
=69;
(5)6×(550-350),
=6×200,
=1200;
(6)120×4+720,
=480+720,
=1200.
=8×200,
=1600;
(2)280+310×3,
=280+930,
=1210;
(3)540-70×7,
=540-490,
=50;
(4)78-72÷8,
=78-9,
=69;
(5)6×(550-350),
=6×200,
=1200;
(6)120×4+720,
=480+720,
=1200.
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