Mental maths. Simple level exercises. Яна Малова
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7 SECTION (DOUBLE FIGURES 30+, +30)
30+16 =
9+30 =
30+61 =
61+30 =
30+60 =
30+52 =
16+30 =
30+62 =
30+5 =
64+30 =
4+30 =
30+66 =
30+58 =
30+7 =
56+30 =
30+57 =
30+18 =
19+30 =
30+11 =
58+30 =
30+19 =
30+55 =
8+30 =
30+8 =
30+17 =
30+50 =
62+30 =
67+30 =
30+64 =
57+30 =
6+30 =
30+67 =
30+3 =
68+30 =
54+30 =
30+53 =
30+15 =
30+54 =
59+30 =
65+30 =
66+30 =
55+30 =
18+30 =
50+30 =
30+65 =
12+30 =
30+2 =
5+30 =
30+51 =
30+9 =
30+69 =
3+30 =
13+30 =
30+1 =
60+30 =
14+30 =
69+30 =
15+30 =
52+30 =
2+30 =
30+14 =
17+30 =
7+30 =
30+13 =
10+30 =
63+30 =
30+56 =
30+10 =
51+30 =
30+12 =
30+4 =
30+68 =
1+30 =
30+59 =
30+63 =
11+30 =
30+6 =
53+30 =
8 SECTION (DOUBLE FIGURES 40+, +40)
40+56 =
54+40 =
2+40 =
4+40 =
40+7 =
57+40 =
40+58 =
5+40 =
50+40 =
40+57 =
40+3 =
58+40 =
40+4 =
40+50 =
53+40 =
40+52 =
56+40 =
40+8 =
40+53 =
40+2 =
8+40 =
52+40 =
55+40 =
40+51 =
40+54 =
40+5 =
59+40 =
40+6 =
9+40 =
40+55 =
6+40 =
7+40 =
40+1 =
51+40 =
40+59 =
40+9 =
3+40 =
1+40 =