Unit Review: Adding & subtracting decimals

M.1Round each decimal to the place named, then add or subtract to estimate.

1. 1
   Nearest whole number: $29.58+4.11$
2. 2
   Nearest whole number: $96.98+30.56$
3. 3
   Nearest whole number: $76.35-67.83$
4. 4
   Nearest whole number: $97.23+65.81$

M.2Add. Line up the decimal points.

1. 5
   34.922

   +31.100
2. 6
   29.533

   +40.002
3. 7
   20.627

   +98.375
4. 8
   49.662

   +32.900

M.3Subtract. Line up the decimal points.

1. 9
   98.144

   −5.484
2. 10
   54.148

   −47.440
3. 11
   91.35

   −38.90
4. 12
   47.09

   −8.40

M.4Add or subtract.

1. 13
   26.407

   −6.620
2. 14
   68.148

   −11.160
3. 15
   93.01

   −22.54
4. 16
   79.603

   +12.900

M.1Estimate Sums & Differences of Decimals

1. 1$30+4=34$
2. 2$97+31=128$
3. 3$76-68=8$
4. 4$97+66=163$

M.2Add Decimals

1. 566.022
2. 669.535
3. 7119.002
4. 882.562

M.3Subtract Decimals

1. 992.66
2. 106.708
3. 1152.45
4. 1238.69

M.4Add & Subtract Decimals

1. 1319.787
2. 1456.988
3. 1570.47
4. 1692.503