FRAME 1-30.
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
____________________________________________________________________________
FRAME 1-31.
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
____________________________________________________________________________
FRAME 1-32.
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
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MD0900
1-13