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用递等式计算,能简算的要简算.85×54÷18+745 &n...
用递等式计算,能简算的要简算.85×54÷18+7452.5×32×1.2535×(1-37)÷51278×1213+78÷13....
用递等式计算,能简算的要简算.85×54÷18+745 2.5×32×1.2535×(1-37)÷512 78×1213+78÷13.
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(1)85×54÷18+745
=4590÷18+745
=255+745
=1000;
(2)2.5×32×1.25
=2.5×(4×8)×1.25
=(2.5×4)×(8×1.25)
=10×10
=100;
(3)35×(1-
)÷
=35×
÷
=20÷
=48;
(4)
×
+
÷13
=
×
+
×
=
×(
+
)
=
×1
=
.
=4590÷18+745
=255+745
=1000;
(2)2.5×32×1.25
=2.5×(4×8)×1.25
=(2.5×4)×(8×1.25)
=10×10
=100;
(3)35×(1-
3 |
7 |
5 |
12 |
=35×
4 |
7 |
5 |
12 |
=20÷
5 |
12 |
=48;
(4)
7 |
8 |
12 |
13 |
7 |
8 |
=
7 |
8 |
12 |
13 |
7 |
8 |
1 |
13 |
=
7 |
8 |
12 |
13 |
1 |
13 |
=
7 |
8 |
=
7 |
8 |
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