[2.25+(335-1.21×511)]÷40%112+216+3112+4120+…+101110(5.4×113+635÷0.75)×125.5(1+23+34+45)×(23+34+45+56)-(1+23+34+45+56)×(23+34+45)-数学
1 |
20 |
1 |
110 |
=(1+
1 |
2 |
1 |
6 |
1 |
12 |
1 |
20 |
1 |
110 |
=(1+2+3+4+…+10)+(
1 |
2 |
1 |
6 |
1 |
12 |
1 |
20 |
1 |
110 |
=(1+10)×10÷2+(
1 |
1×2 |
1 |
2×3 |
1 |
3×4 |
1 |
4×5 |
1 |
10×11 |
=11×10÷2+(1-
1 |
2 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
4 |
1 |
4 |
1 |
5 |
1 |
10 |
1 |
11 |
=55+(1-
1 |
11 |
=55+
10 |
11 |
=55
10 |
11 |
(3)(5.4×1
1 |
3 |
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