1. 19分之7×13+19分之13×31 2.(51分之2+18分之5)×9×17 3.(24分之5+12分之7-3分之2)×48要过程 请标号那题是哪题很急
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![1. 19分之7×13+19分之13×31 2.(51分之2+18分之5)×9×17 3.(24分之5+12分之7-3分之2)×48要过程 请标号那题是哪题很急](/uploads/image/z/29495-47-5.jpg?t=1.+19%E5%88%86%E4%B9%8B7%C3%9713%EF%BC%8B19%E5%88%86%E4%B9%8B13%C3%9731+2.%EF%BC%8851%E5%88%86%E4%B9%8B2%EF%BC%8B18%E5%88%86%E4%B9%8B5%EF%BC%89%C3%979%C3%9717+3.%EF%BC%8824%E5%88%86%E4%B9%8B5%EF%BC%8B12%E5%88%86%E4%B9%8B7-3%E5%88%86%E4%B9%8B2%EF%BC%89%C3%9748%E8%A6%81%E8%BF%87%E7%A8%8B+++%E8%AF%B7%E6%A0%87%E5%8F%B7%E9%82%A3%E9%A2%98%E6%98%AF%E5%93%AA%E9%A2%98%E5%BE%88%E6%80%A5)
1. 19分之7×13+19分之13×31 2.(51分之2+18分之5)×9×17 3.(24分之5+12分之7-3分之2)×48要过程 请标号那题是哪题很急
1. 19分之7×13+19分之13×31 2.(51分之2+18分之5)×9×17 3.(24分之5+12分之7-3分之2)×48
要过程 请标号那题是哪题
很急
1. 19分之7×13+19分之13×31 2.(51分之2+18分之5)×9×17 3.(24分之5+12分之7-3分之2)×48要过程 请标号那题是哪题很急
原式=7/19x13+13/19x31
=(7x13+13x31)/19
=13x(7+31)/19
=13x2
=26
原式=(2/51+5/18)x9x17
=2x9x17/51+5x9x17/18
=2x9/3+5x17/2
=6+85/2
=97/2
=48.5
原式=(5/24+7/12-2/3)x48
=5x48/24+7x48/12-2x48/3
=10+28-32
=6
1.
(7×13)/19+(13×31)/19
=(7×13+31×13)/19
=13×(7+31)/19
=13×38/19
=13×2
=26
2.
(2/51+5/18)×9×17
=2×9×17/51 +5×9×17/18
=18/3 +5×17/2
=6 +85/2
=97/2...
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1.
(7×13)/19+(13×31)/19
=(7×13+31×13)/19
=13×(7+31)/19
=13×38/19
=13×2
=26
2.
(2/51+5/18)×9×17
=2×9×17/51 +5×9×17/18
=18/3 +5×17/2
=6 +85/2
=97/2
3.
(5/24+7/12-2/3)×48
=5×48/24 +7×48/12 -2×48/3
=5×2+7×4-2×16
=10+28-32
=6
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