1 |
32 |
=2.5×1.25×32,
=(2.5×4)×(1.25×8),
=10×10,
=100;
(2)75×32×1.25,
=(75×4)×(8×1.25),
=300×10,
=3000;
(3)101×93-93,
=(101-1)×93,
=100×93,
=9300;
(4)43×6.9+69×5.7,
=43×6.9+6.9×57,
=(43+57)×6.9,
=100×6.9,
=690.
脱式计算(用你喜欢的方式计算). 2.5×1.25÷
| 75×32×1.25 | ||
101×93-93 | 43×6.9+69×5.7. |
1 |
32 |