Test 1 Review

Estimate Sum by Rounding

100

2903 + 1102

3000 + 1000 = 4,000

200

7987 + 2019

8000 + 2000 = 10,000

300

4176 + 8885

4000 + 9000 = 13,000

400

3997 + 4009

4000 + 4000 = 8,000

500

1988 + 7071

2000 + 7000 = 9,000

Solve

100

(+48) + (4)

52

200

(-2) + (+24)

22

300

(-3) - (-34)

-3 + 34 = 31

400

(+35) - (+71)

35 + (-71) = -36

500

(-18) - (+82)

(-18) + (-82) = -100

Solve

100

(9)(11)

99

200

(5)(-6)

-30

300

(-3)(-20)

60

400

(10)(13)(-1)

-130

500

(-5)(-12)(-1)

-60

Find Natural Number Factors

100

12

1,2,3,4,6,12

200

15

1,3,5,15

300

18

1,2,3,6,9,18

400

20

1,2,4,5,10,20

500

24

1,2,3,4,6,8,12,24

Solve

100

85419 + 13602

99,021

200

15433 - 10662

4,771

300

177 x 92

16,284

400

435 x 35

15,225

500

658 divided by 94

7