Solution to

You can also check a division problem by multiplying the divisor by the

Frame 1-29

quotient (without the remainder) and adding the remainder.

374r2

CHECK

Check the division problem in Frame 1-25 using this method.

13/ 4864

374

39

x13

NOTE: If the remainder is expressed as a fraction, multiply the entire

96

1122

quotient by the divisor to obtain the dividend. Multiplying fractions is

91

3740

discussed later.

54

4862

52

+2

2

4864

____________________________________________________________________________

Solution to

Multiplication can be checked by switching the factors (for example, the

Frame 1-30

product of 232 x 176 should be the same as the product of 176 x 232).

Work both problems and see for yourself.

23

107

161

23

2461

+0

2461

____________________________________________________________________________

Solution to

Multiplication can also be checked by dividing the product by either the

Frame 1-31

multiplicand or the multiplier. If you divide the product by the

multiplicand, the quotient will be the multiplier. If you divide the product

232

176

by the multiplier, the quotient will be the multiplicand.

176

232

1392

352

For example: 2 x 3 = 6 can be checked by dividing:

16240

5280

23200

35200

3

2

40832

40832

2/ 6

OR

3/ 6

Remember that you may use either one of the factors as the divisor, but

the quotient must be the other factor.

Solve and check this problem: 25 x 12

____________________________________________________________________________

MD0900

1-13

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