优质解答
a-f=5,b-f=4,c-g=4,b-h=6,d-i=5.
“九宫格”中九个数的和为:
b-g+6+b-i+4+c-h+c-i+d-g+d-h+5
=2b+2c+2d-2g-2i-2h+15
=2(b-h)+2(c-g)+2(d-i)+15
=2×6+2×4+2×5+15
=12+8+10+15
=45
故答案为:45.
a-f=5,b-f=4,c-g=4,b-h=6,d-i=5.
“九宫格”中九个数的和为:
b-g+6+b-i+4+c-h+c-i+d-g+d-h+5
=2b+2c+2d-2g-2i-2h+15
=2(b-h)+2(c-g)+2(d-i)+15
=2×6+2×4+2×5+15
=12+8+10+15
=45
故答案为:45.