Review Decimals - One more time
 When adding or subtracting, line up the decimals.  Watch for numbers without decimals.  THEY AREWHOLE NUMBERS.  Their decimals are at the end likea period at the end of a sentence.3 + 5.9 + 2.3 would be as follows...Put a decimal behindthe 3.11.213.05.92.39 + 3 = 12Carry the one. 4.6 + 5 + 9.7 becomes...+4 . 6  9 . 7. 7.43 + 4.2 + 5 =  54.93 + 4.98 = 6.3 + 7 + 5.9 = When subtracting decimals, still line up the decimalsmaking sure to put decimals behind any whole numbers.If the top digit is smaller than the bottom digit in a place value, you must rename.   5.0- 1.23.8410   6.1-2.8    .3   8.2-5.3    .9   7.0-2.8  4.   4.0-2.6    8.4-2.8    8.4-3.0   6.4 - 3.7 = 7 - 2.3 =   6 - 3.7 = 100 - 4.5 = When multiplying, we do not need to  line up decimals.Multiply as if the decimals are not there.  Then counthow many digits are behind the decimals for each factor.  Make sure the answer has the same numberbehind it.  3.4 x .04 is as follows. 0.136     3.4x 0.04three place valuesone place valuetwo place value+ Fill in your work.   3.25x   0.4 . In 4.23 x 3.7 how many places does the decimal needto move?place values left In 4.23 x 1.27 how many places does the decimal needto move?place values left In .005 x 3.17 how many places does the decimal needto move?place values left In .005 x 1.2 how many places does the decimal needto move?place values left Multiply.  3.2 x .7 Multiply.  .042 x 5             0. Fill in all  9 missing digits.   3 . 4 2   x   1.41 3      8    .7 Fill in all  14 missing digits.   x   3.84 6      4      .9   5 . 7 8 Fill in all  missing digits.   8  2 .8   x .2  86 6      4      .1 Fill in all  missing digits.   8  2 .8   x  6 .5  4 1      0       8 .       4.6 3   x 1 3.4 Needs to move                          Doesn't need to move.Since we can't divide by a decimal, if the divisor is a decimal, move the decimal to the end to make it a whole number.  THEN, MOVE THE SAME NUMBER OF PLACES VALUES IN THE DIVIDEND.  If a number has no visible decimal, its a whole number.  Its decimal is atthe end.1.6   8.5...16    .8.05 The decimal in dividend moves straight up.  There is no need to move over as the divisor is a wholenumber.  Decimals in the divisor, dividend, and quotient all move over one place value because the divisor is a decimal.1.26 The decimal in dividend moves straight up.  There is no need to move over as the divisor is a wholenumber.  Decimals in the divisor, dividend, and quotient all move over one place value because the divisor is a decimal.126 The decimal in dividend moves straight up.  There is no need to move over as the divisor is a wholenumber.  Decimals in the divisor, dividend, and quotient all move over two place values because the divisor is a decimal..126 The decimal in dividend moves straight up.  There is no need to move over as the divisor is a wholenumber.  Decimals in the divisor, dividend, and quotient all move over two place values because the divisor is a decimal.0.231.311 The decimal in dividend moves straight up.  There is no need to move over as the divisor is a wholenumber.  Decimals in the divisor, dividend, and quotient all move over two place values because the divisor is a decimal.2313.11 0.0570.575.7Select the answer with the decimal in the correct place.0.231.31157 0.0570.575.7Select the answer with the decimal in the correct place.2.31.31157 0.0570.575.7Select the answer with the decimal in the correct place.231.31157 0.0830.838.3Select the answer with the decimal in the correct place.0.473.90183 0.0830.838.3Select the answer with the decimal in the correct place.   47 3.90183 0.0830.838.3Select the answer with the decimal in the correct place.  4.73.90183 9.135 ÷ 4.5 = 62.424 ÷7.2 =
Students who took this test also took :

Created with That Quiz — where test making and test taking are made easy for math and other subject areas.