怎样简便就怎样计算.16.75+67.8+3.25+32.2 28×15+
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怎样简便就怎样计算.
16.75+67.8+3.25+32.2 | 28×15+15×72 |
125×62×8 | 6.2-1.82-1.18 |
600÷25÷4 | 6.8+7.5-6.8+7.5. |
![怎样简便就怎样计算.16.75+67.8+3.25+32.2 28×15+](/uploads/image/z/16763549-5-9.jpg?t=%E6%80%8E%E6%A0%B7%E7%AE%80%E4%BE%BF%E5%B0%B1%E6%80%8E%E6%A0%B7%E8%AE%A1%E7%AE%97%EF%BC%8E16.75%2B67.8%2B3.25%2B32.2%26nbsp%3B%26nbsp%3B%26nbsp%3B%26nbsp%3B28%C3%9715%2B)
(1)16.75+67.8+3.25+32.2
=(16.75+3.25)+(67.8+32.2)
=20+100
=120;
(2)28×15+15×72
=(28+72)×15
=100×15
=1500;
(3)125×62×8
=(125×8)×62
=1000×62
=62000;
(4)6.2-1.82-1.18
=6.2-(1.82+1.18)
=6.2-3
=3.2;
(5)600÷25÷4
=600÷(25×4)
=600÷100
=6;
(6)6.8+7.5-6.8+7.5
=(6.8-6.8)+(7.5+7.5)
=0+15
=15.
=(16.75+3.25)+(67.8+32.2)
=20+100
=120;
(2)28×15+15×72
=(28+72)×15
=100×15
=1500;
(3)125×62×8
=(125×8)×62
=1000×62
=62000;
(4)6.2-1.82-1.18
=6.2-(1.82+1.18)
=6.2-3
=3.2;
(5)600÷25÷4
=600÷(25×4)
=600÷100
=6;
(6)6.8+7.5-6.8+7.5
=(6.8-6.8)+(7.5+7.5)
=0+15
=15.