Unit Review: Whole-number operations

A.1Add or subtract.

1. 1
   3284786

   +180879
2. 2
   3131106

   −898321
3. 3
   9073712

   −680994
4. 4
   8475797

   +880659

A.2Multiply.

1. 5
   $50\times 200=$ 
2. 6
   $2,000\times 50=$ 

A.3Round each factor to its greatest place. Then multiply to estimate.

1. 7
   $7,530\times 82$
2. 8
   $286\times 298$

A.4Multiply.

1. 9
   8204

   ×50
2. 10
   3065

   ×26
3. 11
   1028

   ×56
4. 12
   3047

   ×50

A.5Divide.

1. 13
   $120,000÷60=$ 
2. 14
   $490,000÷70=$ 

A.6Round the divisor to the nearest ten. Then use a basic fact to estimate.

1. 15
   $6,295÷58$
2. 16
   $6,670÷54$

A.7A.8Divide. Write any remainder with R.

1. 17
   896690
2. 18
   623919
3. 19
   36242716
4. 20
   9554775

A.9Divide. Write each remainder as a fraction in simplest form.

1. 21
   $774÷5=$ 
2. 22
   $200÷3=$ 

A.1Add & Subtract Whole Numbers

1. 13,465,665
2. 22,232,785
3. 38,392,718
4. 49,356,456

A.2Multiply Numbers Ending in Zeros

1. 510,000
2. 6100,000

A.3Estimate Products

1. 7$8,000\times 80=640,000$
2. 8$300\times 300=90,000$

A.4Multiply Whole Numbers

1. 9410,200
2. 1079,690
3. 1157,568
4. 12152,350

A.5Divide Numbers Ending in Zeros

1. 132,000
2. 147,000

A.6Estimate Quotients: 2-Digit Divisors

1. 15$6,000÷60=100$
2. 16$6,500÷50=130$

A.7A.8Divide. Write any remainder with R.

1. 1775 R15
2. 1863 R13
3. 19118
4. 205

A.9Write Remainders as Fractions

1. 21$154\frac{4}{5}$
2. 22$66\frac{2}{3}$