49÷[45-(15+13)]13+3-(14+112)3×(215+112)-2534×57×43-121516+(716-14)÷1223-89×38÷127(13-14)÷12+5612×3+12÷1523+(47+12)×7258×56+25÷4.-数学
=
2 |
5 |
1 |
4 |
2 |
5 |
=
1 |
4 |
④
3 |
4 |
5 |
7 |
4 |
3 |
1 |
2 |
=
3 |
4 |
4 |
3 |
5 |
7 |
1 |
2 |
=
5 |
7 |
1 |
2 |
=
3 |
14 |
⑤
15 |
16 |
7 |
16 |
1 |
4 |
1 |
2 |
=
15 |
16 |
3 |
16 |
1 |
2 |
=
15 |
16 |
6 |
16 |
=
21 |
16 |
⑥23-
8 |
9 |
3 |
8 |
1 |
27 |
=23-9,
=14;
⑦(
1 |
3 |
1 |
4 |
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