자연수의 사칙연산 단원 종합

A.1Add or subtract.

1. 1
   6123713

   −245266
2. 2
   9161254

   −269780
3. 3
   7576320

   −279447
4. 4
   7548067

   −566685

A.2Multiply.

1. 5
   $40\times 900=$ 
2. 6
   $600\times 30=$ 

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

1. 7
   $574\times 398$
2. 8
   $1,329\times 59$

A.4Multiply.

1. 9
   3208

   ×54
2. 10
   6006

   ×64
3. 11
   5607

   ×56
4. 12
   2003

   ×74

A.5Divide.

1. 13
   $350,000÷50=$ 
2. 14
   $90,000÷30=$ 

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

1. 15
   $3,397÷13$
2. 16
   $4,525÷13$

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

1. 17
   237614
2. 18
   495757
3. 19
   31716484
4. 20
   3407140

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

1. 21
   $669÷8=$ 
2. 22
   $513÷2=$ 

A.1Add & Subtract Whole Numbers

1. 15,878,447
2. 28,891,474
3. 37,296,873
4. 46,981,382

A.2Multiply Numbers Ending in Zeros

1. 536,000
2. 618,000

A.3Estimate Products

1. 7$600\times 400=240,000$
2. 8$1,000\times 60=60,000$

A.4Multiply Whole Numbers

1. 9173,232
2. 10384,384
3. 11313,992
4. 12148,222

A.5Divide Numbers Ending in Zeros

1. 137,000
2. 143,000

A.6Estimate Quotients: 2-Digit Divisors

1. 15$3,400÷10=340$
2. 16$4,500÷10=450$

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

1. 17331 R1
2. 18117 R24
3. 1952
4. 2021

A.9Write Remainders as Fractions

1. 21$83\frac{5}{8}$
2. 22$256\frac{1}{2}$