FUNDAMENTAL OPERATIONS

Addition and Subtraction

[Without pencil]

Practice giving the sums and the differences of the following

until you can give all in less than two minutes:

Practice stating the sums, and then the differences, until you

can give all in less than two minutes :

Give the differences (in less than one minute) between:

29. Give the sums without using pencil or paper:

Check all additions by adding in the opposite direction. Thus, add downward after adding upward, or add from right to left after adding from left to right.

Check all subtractions by adding the difference to the subtrahend, to note whether the sum thus obtained is the same as the minuend.

Find the sum of:

2. 31,876, 18, 365, 1,760,197, 5,234,695, and 76,219,765.
3. 19,765,249, 37,689, 457,652, 5,764,321, and 7,596,-
321,406.

Solve the following:

4. 4625+106,752+59,648+4009+58+60,765+952,126= ?
5. Add seventy-eight thousand four hundred nine, sixteen.
million three hundred fifteen thousand nine hundred fifty-four,
and two hundred nineteen thousand four hundred eight.

6. Add upwards and crosswise :

7. Add three hundred forty and six hundredths, five hun-
dred sixty ten-thousandths, eight hundred and four thousandths,
and eight hundred five thousandths.

Find the balance in each bank:

DEPOSITS

AMOUNTS WITHDRAWN

་

BALANCE
?

11. $6761.20, $276.15 $1789.27, $1072.29, $763.75
12. $3765.82, $176.25 $ 689.25, $ 399.76, $987.25 ?
13. $4370.56, $462.15 $ 389.76, $1021.28, $876.45 ?
14. From 52 subtract 7.09; 4.0076; 15.01235; .67542.
15. From 1567.025 subtract 3561; 989.02; 784; 276.00875.
16. What number must be added to 49,866 to produce
900,004?

17. Add upwards and also crosswise: