Step-by-step explanation:
look at the already present values in the table.
there is 473 under "number" in the first line.
398 under "100 more" in the second line.
and 890 under "10 less" in the third line.
the column "number" is always the foundation for all the other columns left and right.
e.g. "100 less" means 100 less than that number in the middle of the same line.
we need to figure out the missing numbers in each line, so that every line is consistent with its "number" in the middle.
first line :
we have "number" already (473). so,
"100 more" = 473 + 100 = 573
"10 more" = 473 + 10 = 483
"1 more" = 473 + 1 = 474
"number" = 473
"1 less" = 473 - 1 = 472
"10 less" = 473 - 10 = 463
"100 less" = 473 - 100 = 373
second line :
we have "100 more" (398). that means this is 100 more than "number". so,
"100 more" = 398
"10 more" = (398 - 100) + 10 = 308
"1 more" = (398 - 100) + 1 = 299
"number" = 398 - 100 = 298
"1 less" = 298 - 1 = 297
"10 less" = 298 - 10 = 288
"100 less" = 298 - 100 = 198
third line :
we have "10 less" (890). that means this is 10 less than "number". so,
"100 more" = (890 + 10) + 100 = 1000
"10 more" = (890 + 10) + 10 = 910
"1 more" = (890 + 10) + 1 = 901
"number" = 890 + 10 = 900
"1 less" = 900 - 1 = 899
"10 less" = 890
"100 less" = 900 - 100 = 800
