8.1 Estimation by rounding

Estimate the product: $\text{31}\cdot \text{87}$ .

Estimate the product: $\text{18}\cdot \text{42}$ .

Estimate the product: $\text{16}\cdot \text{94}$ .

Estimate the quotient: $\text{221}÷\text{18}$ .

Estimate the quotient: $\text{4,079}÷\text{381}$ .

Estimate the quotient: $\text{609,000}÷\text{16,000}$ .

Estimate the sum: $\text{61}\text{.}\text{02}+\text{26}\text{.}8$ .

Estimate the sum: $\text{109}\text{.}\text{12}+\text{137}\text{.}\text{88}$ .

Estimate the product: $(\text{47}\text{.}8)(\text{21}\text{.}1)$ .

Estimate 32% of 14.88.

$\mathrm{1,}\text{402}+\mathrm{2,}\text{198}$

$\text{3,481}+\text{4,216}$

$\text{921}+\text{796}$

$\text{611}+\text{806}$

$\mathrm{4,}\text{681}+\mathrm{9,}\text{325}$

$\mathrm{6,}\text{476}+\mathrm{7,}\text{814}$

$\mathrm{7,}\text{805}-\mathrm{4,}\text{266}$

$\mathrm{8,}\text{427}-\mathrm{5,}\text{342}$

$\text{14},\text{106}-\mathrm{8,}\text{412}$

$\text{26},\text{486}-\text{18},\text{931}$

$\text{32}\cdot \text{53}$

$\text{67}\cdot \text{42}$

$\text{628}\cdot \text{891}$

$\text{426}\cdot \text{741}$

$\text{18},\text{012}\cdot \text{32},\text{416}$

$\text{22},\text{481}\cdot \text{51},\text{076}$

$\text{287}÷\text{19}$

$\text{884}÷\text{33}$

$\mathrm{1,}\text{254}÷\text{57}$

$\mathrm{2,}\text{189}÷\text{42}$

$\mathrm{8,}\text{092}÷\text{239}$

$\mathrm{2,}\text{688}÷\text{48}$

$\text{72}\text{.}\text{14}+\text{21}\text{.}\text{08}$

$\text{43}\text{.}\text{016}+\text{47}\text{.}\text{58}$

$\text{96}\text{.}\text{53}-\text{26}\text{.}\text{91}$

$\text{115}\text{.}\text{0012}-\text{25}\text{.}\text{018}$

$\text{206}\text{.}\text{19}+\text{142}\text{.}\text{38}$

$\text{592}\text{.}\text{131}+\text{211}\text{.}6$

$\left(\text{32}\text{.}\text{12}\right)\left(\text{48}\text{.}7\right)$

$\left(\text{87}\text{.}\text{013}\right)\left(\text{21}\text{.}\text{07}\right)$

$\left(3\text{.}\text{003}\right)\left(\text{16}\text{.}\text{52}\right)$

$\left(6\text{.}\text{032}\right)\left(\text{14}\text{.}\text{091}\right)$

$\left(\text{114}\text{.}\text{06}\right)\left(\text{384}\text{.}3\right)$

$\left(\mathrm{5,}\text{137}\text{.}\text{118}\right)\left(\text{263}\text{.}\text{56}\right)$

$\left(6\text{.}\text{92}\right)\left(0\text{.}\text{88}\right)$

$\left(\text{83}\text{.}\text{04}\right)\left(1\text{.}\text{03}\right)$

$\left(\text{17}\text{.}\text{31}\right)\left(\text{.}\text{003}\right)$

$\left(\text{14}\text{.}\text{016}\right)\left(\text{.}\text{016}\right)$

$\text{93}\text{\% of }7\text{.}\text{01}$

107% of 12.6

32% of 15.3

74% of 21.93

18% of 4.118

4% of .863

2% of .0039

( [link] ) Find the difference: $\frac{7}{\text{10}}-\frac{5}{\text{16}}\text{.}$

( [link] ) Find the value $\frac{6-\frac{1}{4}}{6+\frac{1}{4}}\text{.}$

( [link] ) Convert the complex decimal $1\text{.}\text{11}\frac{1}{4}$ to a decimal.

( [link] ) A woman 5 foot tall casts an 8-foot shadow at a particular time of the day. How tall is a tree that casts a 96-foot shadow at the same time of the day?

( [link] ) 11.62 is 83% of what number?