1.2.3.4.5.6.7.8.9 how to make it equal to 15 for mixed addition, number addition and oblique addition
2 9 4
7 5 3
6 1 8
First put five in the middle
And then the remaining eight numbers
9+1=8+2=7+3=6+4
Just line up
Simple calculation of 15 / 8-9 / 1 + 15 / 7
15 / 8-9 / 1 + 15 / wrong title
It should be 8 / 15-1 / 9 + 7 / 15
=8/15+7/15-1/9
=1-1/9
=8/9
Simple calculation: 8 / 15 - (7 / 8-7 / 15) and 4 / 9 - (4 / 9-1 / 10)
8/15-(7/8-7/15)=8/15-7/8+7/15=8/15+7/15-7/8=1-7/8=1/8
4/9-(4/9-1/10)=4/9-4/9+1/10=0+1/10=1/10