Equivalent Rational Numbers Comparing and Ordering Decimals Estimating Decimal Sums and Differences SWBAT write numbers in equivalent forms; compare and order decimals; to estimate sums or differences

Equivalent numbers  What do you notice about the following numbers? 2 ¼ 2.25 They are equivalent  What operation does the fraction bar represent? Division

Converting Fractions to Decimals  1/3  -7/10  -1 13/20  -12/5  Try the problems on your sheet.    2.8

Converting Decimals to Fractions  Count the number of decimal places  Place the numbers after the decimal over a power of 10, with the same number of zeros as decimal places.  3.09   0.09 

Try the problems on your paper  1 25/100 or 1 ¼  -875/1000 or -7/8  -1 6/100 or -1 3/50  7/10

Ordering Decimals  How do you determine if a number is greater than another? Compared the numbers in the same place values Just because a decimal is longer, does not necessarily make it bigger  0.04; 0.027; 0.2;  ; ; ; -4.4  0.719; -0.79; 0.79;

Try the problems on your paper  -1.06; ; 0.7; 1.25  2 4/5; 5/16; -1/8

Estimating Front End Estimation RoundingCompatible numbers x x x 7.2 Round to the greatest place value Round to the nearest whole number Pick easy numbers 50 x 7 47 x 7 50 x 10