Estimation of Sum and Product

Q.

Round to the nearest ten:

$47$

Q. Find the value of the following Roman numerals in decimal. Also, give a proper explanation for each step.
a) XXX
b) IX
c) VII
d) XII
[4 MARKS]

Q.

Estimate the following result:

$6893-789$.

Q. XLVI + LXX = ______.

1. CXVI
2. XCIV
3. XCVI
4. CXIV

Q.

Estimate using general rule $640+892$.

Q.

Estimate the sum by rounding off the number to the nearest hundreds:$207+391$

Q.

Estimate the following result:

$968x539$.

Q. Represent 45 in Roman numerals.

1. XL
2. LXV
3. XLV
4. None of the above

Q.

Estimate the difference by rounding off the number to the nearest hundreds:$629-485$

Q.

Estimate the following result:

$39x311$.

Q.

Round off $5823$ to the nearest thousands.

Q.

Round off $5249$ to the nearest hundred.

Q. Find the sum of 65, 430 and 4, 560 after rounding them off to the nearest hundreds.

1. 70, 500
2. 69, 500
3. 70, 000
4. 71, 000

Q.

Round to the nearest ten:

$1328$

Q. Find the estimated sum of $89.55$ and $60.4$ and choose the correct representation of the estimated sum in Roman numerals.

1. ML
2. CL
3. DV
4. IV

Q. Bobby's date of birth is ${19}^{th}$ September. Express the date in Roman numeral.

1. $XXI$
2. $XIXX$
3. $IIX$
4. $XIX$

Q. Which of the following is the Indo-Arabic numeral for the Roman Numeral 'M'?

1. 10
2. 50
3. 100
4. 1000

Q. Hindu-Arabic numeral for $CCXLVII$, is ________.

1. $267$
2. $347$
3. $247$
4. $367$

Q.

Estimated sum of $6826$and $11469$ rounded off to hundreds is $18,000$.

1. True
2. False

Q.

Round off $997$ to the nearest tens.

Q. The product obtained in Roman numeral when $28$ is multiplied by $2$ is

1. LIV
2. LII
3. LVI
4. LVII

Q. Compare $XXII$ __ $12$ (using $>,<,=$)

1. $>$
2. $<$
3. $=$
4. none

Q. The product obtained when $13$ is multiplied by $7$(in roman number ) is

1. CI
2. XXCI
3. LXI
4. XCI