题目内容
| 计算 5×16×8 | (7+21)×5 | (35+5)×6 | 1680×5. |
(1)5×16×8,
=80×8,
=640;
(2)(7+21)×5,
=28×5,
=140;
(3)(35+5)×6,
=40×6,
=240;
(4)1680×5=8400.
=80×8,
=640;
(2)(7+21)×5,
=28×5,
=140;
(3)(35+5)×6,
=40×6,
=240;
(4)1680×5=8400.
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