80 + 20 = 70 + 30 = 160 + 40 = 390 + 10 =
80 + 27 = 75 + 30 = 160 + 41 = 393 + 10 =
93 + 7 = 95 + 5 = 198 + 2 = 799 + 1 =
93 + 8 = 95 + 7 = 198 + 4 = 799 + 3 =
93 + 9 = 95 + 9 = 198 + 7 = 799 + 9 =
74 + 30 = 90 + = 105 98 + 5 = 290 + = 301
82 + 26 = + 53 = 103 = 196 + 6 = 497 + 7
100 - 20 = 100 - 6 = 300 - 40 = 500 - 9 =
110 - 20 = 102 - 6 = 308 - 40 = 505 - 9 =
102 - 20 = 105 - 6 = 320 - 40 = 507 - 9 =
110 - 12 =
110 - 10
- 2
=
 
106 - 10 =
100 - 10
+
6
=
120 - 25 =
(120 - 20 )
-
=
 
110 - 50 =
(100 - 50)
+
=
330 - 50 =
(330 - )
- 20
=
 
205 - 30 =
(200 - )
+
5
=
203 - 8 =
( - )
-
=
 
320 - 60 =
( - 60)
+
20
=
540 - 47 =
( - )-
=
 
533 - 50 =
(500 - )
+
=
calculmental26-
101
105
205
307
110 - 14 =
= 103 - 8
6
420 - 30 =
204 - = 198
9
204 - 8 =
- 6 = 298
30
660 - 66 =
821 - 16 =
 
1001 - 3 =
= 1203 - 5