1-[1-(
|
| ||||||||||||||||||||
| [5.7-4.8×(480%-3.8)]÷0.45 |
| ||||||||||||||||||||
| (1+
|
| 5 |
| 7 |
| 3 |
| 14 |
| 3 |
| 4 |
| 2 |
| 7 |
=1-[1-(
| 5 |
| 7 |
| 2 |
| 7 |
| 2 |
| 7 |
=1-[1-1]×
| 2 |
| 7 |
=1-0×
| 2 |
| 7 |
=1-0,
=1;
(2)
| 9 |
| 32 |
| 3 |
| 4 |
| 5 |
| 16 |
| 1 |
| 4 |
=
| 9 |
| 32 |
| 3 |
| 4 |
| 9 |
| 16 |
=
| 9 |
| 32 |
| 3 |
| 16 |
=
| 3 |
| 2 |
(3)[5.7-4.8×(480%-3.8)]÷0.45,
=[5.7-4.8×1]÷0.45,
=[5.7-4.8]÷0.45,
=0.9÷0.45,
=2;
(4)
| 987×655-321 |
| 666+987×654 |
| 1 |
| 2 |
| 1 |
| 4 |
=
| 987×(654+1)-321 |
| 666+987×654 |
| 1 |
| 2 |
| 1 |
| 4 |
=
| 987×654+987-321 |
| 666+987×654 |
| 1 |
| 2 |
| 1 |
| 4 |
=
| 987×654+666 |
| 666+987×654 |
| 1 |
| 2 |
| 1 |
| 4 |
=1+4
| 1 |
| 2 |
| 1 |
| 4 |
=1+18,
=19;
(5)
| 1 |
| 2004 |
| 2 |
| 2004 |
| 3 |
| 2004 |
| 100 |
| 2004 |
=
| 1+2+3+…100 |
| 2004 |
=
| (1+100)×50 |
| 2004 |
=
| 5050 |
| 2004 |
=
| 2525 |
| 1002 |
(6)(1+
| 5 |
| 99 |
| 5 |
| 33 |
| 5 |
| 11 |
| 1 |
| 99 |
| 1 |
| 33 |
| 1 |
| 11 |
=[(1+3+9)+(
| 5 |
| 99 |
| 5 |
| 33 |
| 5 |
| 11 |
| 1 |
| 99 |
| 1 |
| 33 |
| 1 |
| 11 |
=[13+
| 65 |
| 99 |
| 13 |
| 99 |
=[13×(1+
| 5 |
| 99 |
| 1 |
| 99 |
=(1+
| 5 |
| 99 |
| 1 |
| 99 |
=
| 104 |
| 99 |
| 100 |
| 99 |
=
| 26 |
| 25 |