Question

Using property find: a) 31×103 b) 47×98​

Answer 1

Answer:

Step-by-step explanation:

1) 31 x 103 = 31 (100+3)

= (31 x 100)+(31 x 3)

= 3100+93 =3193

2) 47 x 98 = 47 (100-2)

= (47 x 100)-(47 x 2)

= 4700-94 =4606

Answer 2

$a.31 \times 103 = 31(100 + 3) \\ = (31 \times 100) + \: ( 31 \times 3) \\ = 3100 + 93 \\ = 3193 \\ b.47 \times 98 = 47(100 - 2) \\ = (47 \times 100) - (47 \times 2) \\ = 4700 - 94 \\ = 4606$

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