计算,能简算的要简算.5.3+5.25+4.7+3.75 6760÷13+17×25 ...
计算,能简算的要简算.5.3+5.25+4.7+3.756760÷13+17×2557×16.31-2.31÷755-5×25+3512.5×0.25×6489×[34-...
计算,能简算的要简算.5.3+5.25+4.7+3.75 6760÷13+17×25 57×16.31-2.31÷755-5×25+3512.5×0.25×64 89×[34-( 716-14)].
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(1)5.3+5.25+4.7+3.75
=(5.3+4.7)+(5.25+3.75)
=10+9
=19
(2)6760÷13+17×25
=520+425
=945
(3)
×16.31-2.31÷
=(16.31-2.31)×
=14×
=10
(4)5-5×
+
=5-2+
=3+
=3
(5)12.5×0.25×64
=12.5×0.25×8×4×2
=(12.5×8)×(0.25×4)×2
=100×1×2
=200
(6)
×[
-(
-
)]
=
×[
-
]
=
×
=
=(5.3+4.7)+(5.25+3.75)
=10+9
=19
(2)6760÷13+17×25
=520+425
=945
(3)
5 |
7 |
7 |
5 |
=(16.31-2.31)×
5 |
7 |
=14×
5 |
7 |
=10
(4)5-5×
2 |
5 |
3 |
5 |
=5-2+
3 |
5 |
=3+
3 |
5 |
=3
3 |
5 |
(5)12.5×0.25×64
=12.5×0.25×8×4×2
=(12.5×8)×(0.25×4)×2
=100×1×2
=200
(6)
8 |
9 |
3 |
4 |
7 |
16 |
1 |
4 |
=
8 |
9 |
3 |
4 |
3 |
16 |
=
8 |
9 |
3 |
4 |
=
2 |
3 |
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