(a) 2 3 2 1
4 0 1 3
0 4 3 9
8 6 4 0
6 7 6 8
9 5 7 5
_ _ _ _
(b) 2 + 8 + 3 + 7 + 5 = .
4 + 9 + 6 + 1 + 3 = .
(c) 21 41 22
32 63 33
64 63 53
__ __ __
“Carrying” may now be taught.
12. Practice writing and reading numbers of three, and four, figures. The pupils at the same time may be given exercises similar to the following:—
213
321
132
413
234
___
769
758
897
786
594
___
Take the last example: the pupil should be taught to think through it rapidly, as follows:—4, 10, 17, 25, 34—write the 4 and carry the 3; 3, 12, 20, 29, 34, 40,—write the 0 and carry the 4; 4, 9, 16, 24, 31, 38; write the whole result.
13. Let the pupils learn to read numbers as high as millions. For a few examples, at first, in subtraction, let the numbers in each order of the minuend be greater than the corresponding ones in the subtrahend; as,
98
45
__
1364
631
____
9842
3512 &c.
____
Use practical problems.
14. Next, those examples necessitating “borrowing” or “carrying” may be given; as,
137092
72348
______
6235
4879
____