Correction :

6 × 4 = 24	54 : 9 = 6
46 - 22 = 24	12 + 5 = 17
20 + 21 = 41	32 - 19 = 13
10 + 7 = 17	4 - 0 = 4
16 + 16 = 32	24 - 1 = 23
18 : 6 = 3	10 : 2 = 5
22 + 7 = 29	27 - 16 = 11
13 - 7 = 6	9 + 24 = 33
25 - 10 = 15	31 - 16 = 15
5 + 23 = 28	13 + 11 = 24