用简便方法计算. 36×25 102×24 35×16×125 137×15-15×37.
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(1)36×25,
=9×4×25,
=9×(4×25),
=9×100,
=900;
(2)102×24,
=(100+2)×24,
=100×24+2×24,
=2400+48,
=2448;
(3)35×16×125,
=35×2×8×125,
=(35×2)×(8×125),
=70×1000,
=70000;
(4)137×15-15×37,
=15×(137-37),
=15×100,
=1500.
=9×4×25,
=9×(4×25),
=9×100,
=900;
(2)102×24,
=(100+2)×24,
=100×24+2×24,
=2400+48,
=2448;
(3)35×16×125,
=35×2×8×125,
=(35×2)×(8×125),
=70×1000,
=70000;
(4)137×15-15×37,
=15×(137-37),
=15×100,
=1500.
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