递等式计算.(34+25)×40713÷1120÷5960×225÷116.
(1)(
+
)×40
=
×40+
×40
=30+16
=46;
(2)7
÷
÷
=
×
×
=
=24;
(3)60×
÷
=60×
×
=
=144.
3 |
4 |
2 |
5 |
=
3 |
4 |
2 |
5 |
=30+16
=46;
(2)7
1 |
3 |
11 |
20 |
5 |
9 |
=
22 |
3 |
20 |
11 |
9 |
5 |
=
22×20×9 |
3×11×5 |
=24;
(3)60×
22 |
5 |
11 |
6 |
=60×
22 |
5 |
6 |
11 |
=
60×22×6 |
5×11 |
=144.
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