(16+19-112)×4×92.5×(1.9+1.9+1.9+1.9)3.64÷4+4.36×25%200512003×20032004(927+729)÷(57+59)12+34+78+1516+3132+6364+12712813+34+25+57+78+920+1021+1124+193514285-数学
=(
1 |
6 |
1 |
9 |
1 |
12 |
=
1 |
6 |
1 |
9 |
1 |
12 |
=6+4+3,
=13;
(2)2.5×(1.9+1.9+1.9+1.9)
=2.5×4×1.9,
=10×1.9,
=19;
(3)3.64÷4+4.36×25%
=3.64×25%+4.36×25%,
=(3.64+4.36)×25%,
=8×25%,
=2;
(4)2005
1 |
2003 |
2003 |
2004 |
=(2004+1
1 |
2003 |
2003 |
2004 |
=2004×
2003 |
2004 |
2004 |
2003 |
2003 |
2004 |
=2003+1,
=2004;
(5)(9
2 |
7 |
2 |
9 |
5 |
7 |
5 |
9 |
=16
32 |
63 |
80 |
63 |
=13;
(6)
1 |
2 |
3 |
4 |
7 |
8 |
15 |
16 |
31 |
32 |
63 |
64 |
127 |
128 |
=(1-
1 |
2 |
1 |
4 |
1 |
128 |
=1+1+1+1+1+1+1-(
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