题目内容
| 100÷4×25 | 619×29-29×519 | 875-237-363,98×37 | 821-(21×40-28) |
(1)100÷4×25,
=25×25,
=625;
(2)619×29-29×519,
=(619-519)×29,
=100×29,
=2900;
(3)875-237-363,
=875-(237+363),
=875-600,
=275;
(4)98×37,
=(100-2)×37,
=100×37-2×37,
=3700-74,
=3626;
(5)821-(21×40-28),
=821-(840-28),
=821-812,
=9.
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