Show:
estimating and solving
mental math
multiplying with zeros
x and division with decimals
breaking apart numbers
100

39 + 192= 

230

100

65+73=

138

100

50 x 40 x 20

2000 x 20=40,000

100

.987 x 10

9.87

100

87 x 4

320 + 28 = 348

200

452 + 598= 

1050

200

87-35=

52

200

75 x 20 x 5

7,500

200

.876 divided by 10

.0876

200

561 x 3

1,500 + 180 + 3 = 1,683

300

951-523=

430

300

427- 218=

209

300

97 x 25 x 40

97,000

300

56.12 x 1000

56,120

300

45 x 200

40 x 200 + 5 x 200 = 8,000 + 1,000= 9,000

400

1039 - 248=

790

400

876+123=





999

400

80 x 50 x 10

4,000 x 10=40,000

400

99.321 x 10

993.21

400

54 x 9= 

450 + 36= 486

500

401-399

0

500

654-399

250

500

16 x 50 x 40=

32,000

500

.034 divided by 100

.00034

500

543 x 6

3,000 + 240 + 18 = 3,258