89. Begin with 2 and count by 2's to 50. Thus, 2, 4, 6, 8, etc.

90. Begin with 3 and count by 2's to 51. Thus, 3, 5, 7, 9, etc.

91. Begin with 4 and count by 2's to 100. 92. Begin with 6 and count by 2's to 80. 93. Begin with 7 and count by 2's to 99. 94. Begin with 8 and count by 2's to 100. 95. Begin with 10 and count by 2's to 90. 96. Count alternately by 2's and 3's to 35. Thus, 2, 5, 7, 10, 12, 15, etc.

97. Count by 3's and 4's to 32.

98. Count by 2's and 4's to 36.

99. Count by 2's and 5's to 35.

100. Count by 3's and 5's to 32.

117. Add 2 to each of the following numbers:

8 9 6 5 7 3 2 4 1

118. To the same numbers add 3; 6; 5; 7; 8; 4; 6; 9.

119. Begin with 4 and count by 4's to 100.

120. Begin with 5 and count by 5's to 200.

121. Count by 6's to 96, beginning with 6. 122. Count by 7's to 98, beginning with 7.

123. Count by 8's to 96, beginning with 8.

124. Count by 9's to 99, beginning with 9.

125. Count by 10's to 100, beginning with 10.

Name the sums of the following:

126. 127. 128. 129. 130. 131. 132. 133. 134. 135. 136.

137. 138. 139. 140. 141. 142. 143. 144. 145. 146. 147.

148. 149. 150. 151. 152. 153. 154. 155. 156. 157. 158.

.177. 178. 179. 180. 181. 182. 183. 184. 185.

Give the sum of each of the following columns:

Add each of

the following columns separately;

then add each row of numbers from left to right:

310.

Let some pupil, begin with the right-hand column
and say, "9, 17, 24, 27, 33, 42 units, equal to 4 tens
267189
and 2 units; add the 4 tens to the next column."
485736 The next pupil will without any delay take up the
918753 process, beginning with the 4 tens reserved, and say,
592847 "4, 12, 14, 18, 23, 26, 34 tens, equal to 3 hundreds
and 4 tens; add the 3 hundreds to the next col-
703928
umn."
So in quick succession let each column be
564789 added upwards, then downwards; then the lines from
right to left, and from left to right, until the whole

533242 class has been exercised upon the example.