Each question in this quiz is timed.
X - 345 = 9 874
10 219
11 319
11 219
13129
350 + X = 800
350
400
450
500
X + 410 = 410
0
1
2
3
X + 38 = 201
163
153
133
173
A + 500 = 1 100
550
600
650
700
8 X = 120
40
15
20
25
Calcula el valor de "a" en: 7 a = 931
134
123
203
Calcular el valor de "m" en: 6 m = 3 204
523
513
534
613
Calcula el valor de "x" en: 5 x = 2 450
490
480
455
Calcula el valor de "b" en: 8 b = 1 344
132
128
168
