Question

Q6. Estimate the following (by rounding off to nearest hundred):
(a) 87 X 31​

Answer 1

Answer:

roundest off 87=90

roundest off 31=30

90*30=2700

Answer 2

$Estimating \: 87 \times 31$

$The \: first \:number, \: 87 ,can \:be \: rounded$

$to \:the\: nearest \:ten \: as \: 90 .$

$The \: second \:number, \: 31 ,can \:be \: rounded$

$to \:the\: nearest \:ten \: as \: 30 .$

$Hence, Estimated \: product = 90 \times 30$

$= 2700$

Therefore.,

$\red{ Estimating \: 87 \times 31}\green {= 2700}$

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