怎样算简便就怎样算.34+58×2553-27-5779÷115+29×51189+(1-34)×494.85-59+5.15-49113+1213×(52-13)-数学
5 |
7 |
=
5 |
3 |
=
2 |
3 |
(3)
7 |
9 |
11 |
5 |
2 |
9 |
5 |
11 |
=
7 |
9 |
5 |
11 |
2 |
9 |
5 |
11 |
=(
7 |
9 |
2 |
9 |
5 |
11 |
=1×
5 |
11 |
=
5 |
11 |
(4)
8 |
9 |
3 |
4 |
4 |
9 |
=
8 |
9 |
1 |
4 |
4 |
9 |
=
8 |
9 |
1 |
9 |
=1;
(5)4.85-
5 |
9 |
4 |
9 |
=4.85+5.15-
5 |
9 |
4 |
9 |
=(4.85+5.15)-(
5 |
9 |
4 |
9 |
=10-1,
=9;
(6)
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