645 + 50 = 695
137 + 645 = 782.
645 times 8 is 5,160.
13.4375
645
1070
428 + 217 = 645
simplified it equals, 9m+8
Dcxlv dcxlv=500+100+(50-10)+5=600+40+5=645
80 and 5/8
No, 8 + 8 = 16, while 8 - 8 = 0.
Yes, -8 plus plus 3 equals -5. The "plus plus" is equivalent to a positive sign, so -8 plus (+3) equals -5.