开动脑筋,用简便方法计算 25×37×4 125×7×8 25×43×8 77×50×6.
问题描述:
开动脑筋,用简便方法计算 25×37×4 |
125×7×8 | 25×43×8 | 77×50×6. |
答
(1)25×37×4,
=25×4×37,
=100×37,
=3700;
(2)125×7×8,
=125×8×7,
=1000×7,
=7000;
(3)25×43×8,
=25×8×43,
=200×43,
=8600;
(4)77×50×6,
=77×(50×6),
=77×300,
=23100.