题目内容
简算下列各题
| 548+468+52 | 9.14-1.34-4.57 | 77+2.7+2.3+23 |
| 3200÷4÷25 | 125×32×25 | 2009×95+5×2009. |
(1)548+468+52
=(548+52)+468,
=600+468,
=1068;
(2)9.14-1.43-4.57
=9.14-(1.43+4.57),
=9.14-6,
=3.14;
(3)77+2.7+2.3+23
=(77+23)+(2.7+2.3),
=100+5,
=105;
(4)3200÷4÷25
=3200÷(4×25),
=3200÷100,
=32;
(5)125×32×25
=(125×8)×(4×25),
=1000×100,
=100000;
(6)2009×95+5×2009
=2009×(95+5),
=2009×100,
=200900.
=(548+52)+468,
=600+468,
=1068;
(2)9.14-1.43-4.57
=9.14-(1.43+4.57),
=9.14-6,
=3.14;
(3)77+2.7+2.3+23
=(77+23)+(2.7+2.3),
=100+5,
=105;
(4)3200÷4÷25
=3200÷(4×25),
=3200÷100,
=32;
(5)125×32×25
=(125×8)×(4×25),
=1000×100,
=100000;
(6)2009×95+5×2009
=2009×(95+5),
=2009×100,
=200900.
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