
怎样算简便就怎样算 23-57+43-27(79+56-14)×72
1个回答
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(1)
-
+
-
=(
+
)-(
+
)
=2-1
=1;
(2)(
+
-
)×72
=
×72+
×72-
×72
=56+60-18
=98.
2 |
3 |
5 |
7 |
4 |
3 |
2 |
7 |
=(
2 |
3 |
4 |
3 |
5 |
7 |
2 |
7 |
=2-1
=1;
(2)(
7 |
9 |
5 |
6 |
1 |
4 |
=
7 |
9 |
5 |
6 |
1 |
4 |
=56+60-18
=98.
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