Show:
Addition
Subtraction
3-Digit Addition
3-Digit Subtraction
Surprise!
100
93 + 27=
120
100
97-18=
79
100

115+ 76 =

191

100

236 - 25=

211

100

Estimate-Round to the nearest ten 49 - 15=

30

200
54 + 76=
130
200
83-47=
36
200

237+13=

250

200

427 - 16=

411
200

Estimate-Round to the nearest ten 69+21=

90

300
28+96=
124
300
92-63=
29
300

296 + 52 =

348

300

843-65=

778

300

Estimate-Round to the nearest hundred 456+32=

400

400
47+56=
103
400
73-56=
17
400

674 + 90=

764

400

328 - 200=

128

400

Estimate-Round to the nearest hundred 765 - 48=

700

500
39+68=
107
500
64-38=
26
500

754+124=

878

500

749-138=

611

500

Add 500 + 245=

745