Complete the two number grids by counting in ones. The first grid starts from 100 and the second grid starts from 250.

The grid starts from 100 and progresses by adding 1 to each subsequent number in a row, and by adding 10 to the number directly above it in a column.

First Grid:
Row 1: 100, 101, 102, 103, 104, 105, 106, 107, 108, 109
Row 2: 110, 111, 112, 113, 114, 115, 116, 117, 118, 119
Row 3: 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130

The completed first grid is:

$$\begin{bmatrix} 100 & 101 & \boxed{102} & \boxed{103} & \boxed{104} & \boxed{105} & 106 & \boxed{107} & \boxed{108} & \boxed{109} \\ 110 & \boxed{111} & \boxed{112} & \boxed{113} & \boxed{114} & \boxed{115} & \boxed{116} & \boxed{117} & 118 & \boxed{119} \\ 120 & 121 & 122 & \boxed{123} & \boxed{124} & \boxed{125} & \boxed{126} & 127 & 128 & \boxed{129} & 130 \end{bmatrix}$$

The grid starts from 250 and progresses by adding 1 to each subsequent number in a row, and by adding 10 to the number directly above it in a column.

Second Grid:
Row 1: 250, 251, 252, 253, 254, 255, 256, 257, 258, 259
Row 2: 260, 261, 262, 263, 264, 265, 266, 267, 268, 269
Row 3: 270, 271, 272, 273, 274, 275, 276, 277, 278, 279

The completed second grid is:

$$\begin{bmatrix} 250 & 251 & \boxed{252} & \boxed{253} & \boxed{254} & \boxed{255} & \boxed{256} & \boxed{257} & \boxed{258} & \boxed{259} \\ \boxed{260} & 261 & 262 & 263 & 264 & \boxed{265} & \boxed{266} & \boxed{267} & \boxed{268} & \boxed{269} \\ \boxed{270} & \boxed{271} & \boxed{272} & \boxed{273} & \boxed{274} & \boxed{275} & \boxed{276} & 277 & 278 & \boxed{279} \end{bmatrix}$$