
能简算的简算下面各题23.4×2.83+23.4×7.17 ...
能简算的简算下面各题23.4×2.83+23.4×7.17(216-13)×(258÷3116)359+4.7+49+0.312.5×56....
能简算的简算下面各题23.4×2.83+23.4×7.17 (216-13)×(258÷3116)359+4.7+49+0.3 12.5×56.
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(1)23.4×2.83+23.4×7.17
=23.4×(2.83+7.17)
=23.4×10
=234;
(2)(2
-
)×(2
÷3
)
=1
×
=
;
(3)3
+4.7+
+0.3
=(3
+
)+(4.7+0.3)
=4+5
=9;
(4)12.5×56
=12.5×(8×7)
=(12.5×8)×7
=100×7
=700.
=23.4×(2.83+7.17)
=23.4×10
=234;
(2)(2
1 |
6 |
1 |
3 |
5 |
8 |
1 |
16 |
=1
5 |
6 |
6 |
7 |
=
11 |
7 |
(3)3
5 |
9 |
4 |
9 |
=(3
5 |
9 |
4 |
9 |
=4+5
=9;
(4)12.5×56
=12.5×(8×7)
=(12.5×8)×7
=100×7
=700.
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