58和71249和21556和21534和56.-数学

题目简介

58和71249和21556和21534和56.-数学

题目详情

5
8
7
12

4
9
2
15

5
6
2
15

3
4
5
6
题型:解答题难度:中档来源:不详

答案

(1)8=2×2×2,12=2×2×3,所以8和12的最小公倍数是2×2×2×3=24,
所以class="stub"5
8
=class="stub"5×3
8×3
=class="stub"15
24
class="stub"7
12
=class="stub"7×2
12×2
=class="stub"14
24


(2)9=3×3,15=3×5,所以9和15的最小公倍数是3×3×5=45,
所以class="stub"4
9
=class="stub"4×5
9×5
=class="stub"20
45
class="stub"2
15
=class="stub"2×3
15×3
=class="stub"6
45


(3)6=2×3,15=3×5,所以6和15的最小公倍数是3×2×5=30,
所以class="stub"5
6
=class="stub"5×5
6×5
=class="stub"25
30
class="stub"2
15
=class="stub"2×2
15×2
=class="stub"4
30


(4)4=2×2,6=2×3,所以4和6的最小公倍数是2×2×3=12,
所以class="stub"3
4
=class="stub"3×3
4×3
=class="stub"9
12
class="stub"5
6
=class="stub"5×2
6×2
=class="stub"10
12

更多内容推荐