Czytaj książkę: «Mental maths. Simple level exercises»
Czcionka:
© Яна Малова, 2020
ISBN 978-5-4498-3366-2
Created with Ridero smart publishing system
MENTAL MATHS
SIMPLE
EXERCISES
2020г.
This manual includes all possible combinations of single and double digits at the level «SIMPLE» (addition). The collection contains more than 700 examples (10 options), divided into sections according to the composition of numbers. Each version has 13 sections (from single digits: 1 – 5 to double digits: 90+, +90).
The manual is designed to solve examples of mental arithmetic at the «SIMPLE» level on the abacus and mentally. It is recommended to use both for self-development of the acquired counting skills, and in preparation for classes and tests in mental arithmetic.
Malova Y.A. Methodist, the teacher of mental arithmetic, 2020.
1 VARIANT
1 SECTION (NUMBERS 1 – 5)
2+5 =
1+1 =
5+3 =
1+2 =
3+5 =
1+3 =
5+1 =
2+1 =
2+2 =
5+4 =
3+1 =
1+5 =
4+5 =
5+2 =
2 SECTION (NUMBERS 1 – 9)
3+1 =
1+5 =
2+5 =
8+1 =
1+1 =
5+3 =
1+2 =
5+2 =
7+2 =
3+5 =
7+1 =
1+3 =
5+1 =
2+1 =
2+7 =
6+1 =
2+2 =
5+4 =
1+7 =
3+6 =
6+2 =
1+8 =
4+5 =
6+3 =
1+6 =
2+6 =
3 SECTION (NUMBERS 10 – 50)
20+10 =
50+20 =
20+50 =
30+10 =
50+40 =
10+50 =
20+20 =
40+50 =
10+30 =
50+10 =
10+10 =
50+30 =
10+20 =
30+50 =
4 SECTION (NUMBERS 10 – 90)
30+60 =
10+80 =
40+50 =
20+50 =
80+10 =
60+20 =
10+10 =
20+60 =
50+30 =
10+20 =
30+50 =
20+70 =
60+10 =
20+20 =
10+30 =
20+10 =
50+10 =
50+40 =
30+10 =
10+50 =
10+70 =
50+20 =
70+20 =
60+30 =
10+60 =
70+10 =
5 SECTION (DOUBLE FIGURES 10+, +10)
10+40=
10+42=
4+10 =
10+63=
7+10 =
10+55=
11+10=
10+41=
12+10 =
13+10 =
10+44=
14+10=
15+10 =
10+1 =
10+23=
10+24=
10+79=
10+4 =
10+52=
10+53=
10+54=
10+58=
10+5 =
10+6 =
10+8 =
10+43=
2+10 =
10+9=
10+57=
10+10 =
5+10 =
10+11 =
10+56=
10+78=
10+12 =
6+10 =
10+13 =
10+60=
10+14 =
10+15 =
10+2 =
10+3 =
9+10 =
10+16 =
19+10 =
10+50=
10+32=
27+10 =
8+10 =
10+17 =
10+20 =
10+22=
10+25=
10+26=
10+33=
10+27=
72+10 =
10+28=
10+18 =
71+10 =
10+19=
10+65=
10+66=
33+10 =
10+29=
10+30=
10+31=
10+34=
10+35=
10+36=
20+10 =
10+37=
10+88=
10+85=
10+38=
24+10 =
10+21=
10+39=
10+45=
10+67=
10+46=
22+10 =
10+47=
25+10 =
10+48=
16+10 =
51+10 =
10+49=
28+10 =
10+51=
53+10 =
10+59=
10+62=
10+64=
10+68=
10+70=
10+72=
10+73=
10+74=
10+75=
10+76=
10+77=
10+80=
10+81=
10+82=
10+83=
10+84=
10+86=
10+87=
10+89=
29+10 =
10+69=
1+10 =
3+10 =
10+61=
17+10 =
10+7 =
48+10 =
18+10 =
52+10 =
81+10 =
21+10 =
10+71=
41+10 =
23+10 =
26+10 =
30+10 =
38+10 =
84+10 =
74+10 =
68+10 =
89+10 =
31+10 =
80+10 =
32+10 =
36+10 =
56+10 =
37+10 =
39+10 =
44+10 =
45+10 =
47+10 =
63+10 =
43+10 =
49+10 =
50+10 =
54+10 =
82+10 =
64+10 =
34+10 =
46+10 =
55+10 =
57+10 =
78+10 =
40+10 =
58 +10 =
59+10 =
60+10 =
62+10 =
66+10 =
70+10 =
73+10 =
67+10 =
42+10 =
87+10 =
75+10 =
61+10 =
86+10 =
88+10 =
76+10 =
65+10 =
69+10 =
35+10 =
77+10 =
79+10 =
83+10 =
85+10 =
6 SECTION (DOUBLE FIGURES 20+, +20)
17+20 =
19+20 =
21+20 =
6+20 =
20+7 =
7+20 =
9+20 =
20+2 =
20+6 =
20+8 =
20+10 =
20+16 =
20+57 =
20+1 =
20+58 =
20+18 =
20+19 =
18+20 =
20+20 =
20+28 =
8+20 =
20+29 =
20+50 =
20+17 =
22+20 =
20+51 =
20+52 =
20+53 =
20+78 =
20+9 =
20+54 =
20+56 =
20+77 =
20+62 =
5+20 =
20+68 =
20+24 =
20+72 =
20+12 =
20+75 =
56+20 =
20+79 =
27+20
69+20 =
1+20 =
20+23 =
3+20 =
77+20 =
65+20 =
20+59 =
4+20 =
10+20 =
20+67 =
76+20 =
20+55 =
20+71 =
20+3 =
20+4 =
20+5 =
15+20 =
16+20 =
2+20 =
20+76 =
23+20 =
28+20 =
29+20 =
50+20 =
63+20 =
20+64 =
20+66 =
24+20 =
51+20 =
20+22 =
20+25 =
71+20 =
20+27 =
72+20 =
53+20 =
20+61 =
74+20 =
20+65 =
55+20 =
26+20 =
20+11 =
20+13 =
20+63=
20+15 =
57+20 =
58+20 =
20+70 =
59+20 =
11+20 =
12+20 =
13+20 =
20+60 =
14+20 =
20+69 =
20+74 =
25+20 =
60+20 =
67+20 =
20+73 =
61+20 =
73+20 =
20+14 =
20+21 =
62+20 =
20+26 =
64+20 =
52+20 =
79+20 =
54+20 =
66+20 =
68+20 =
70+20 =
75+20 =
78+20 =
7 SECTION (DOUBLE FIGURES 30+, +30)
30+58 =
61+30 =
30+60 =
30+5 =
30+2 =
30+7 =
30+55 =
8+30 =
30+8 =
30+16 =
30+61 =
64+30 =
30+17 =
30+19 =
30+50 =
62+30 =
30+14 =
63+30 =
30+56 =
30+64 =
30+67 =
30+11 =
30+3 =
30+68 =
1+30 =
30+59 =
5+30 =
30+51 =
30+9 =
4+30 =
30+66 =
30+52 =
57+30 =
6+30 =
17+30 =
7+30 =
30+13 =
9+30 =
10+30 =
55+30 =
30+65 =
12+30 =
3+30 =
13+30 =
14+30 =
69+30 =
15+30 =
52+30 =
2+30 =
16+30 =
18+30 =
50+30 =
30+10 =
51+30 =
30+12 =
30+15 =
11+30 =
30+6 =
30+1 =
60+30 =
30+4 =
30+63 =
53+30 =
68+30 =
30+62 =
54+30 =
30+53 =
30+69 =
56+30 =
30+57 =
30+18 =
19+30 =
58+30 =
30+54 =
59+30 =
65+30 =
66+30 =
67+30 =
8 SECTION (DOUBLE FIGURES 40+, +40)
4+40 =
40+1 =
51+40 =
40+6 =
40+7 =
40+2 =
40+3 =
58+40 =
40+4 =
40+9 =
3+40 =
40+50 =
53+40 =
40+52 =
40+8 =
40+53 =
55+40 =
40+51 =
40+54 =
57+40 =
40+58 =
5+40 =
9+40 =
50+40 =
40+57 =
40+55 =
6+40 =
7+40 =
8+40 =
52+40 =
40+59 =
1+40 =
40+56 =
54+40 =
2+40 =
56+40 =
40+5 =
59+40 =
9 SECTION (DOUBLE FIGURES 50+, +50)
50+26 =
21+50 =
50+2 =
22+50 =
50+27 =
15+50 =
30+50 =
50+24 =
17+50 =
23+50 =
50+13 =
50+18 =
50+30 =
24+50 =
50+3 =
50+12 =
50+29 =
50+4 =
50+5 =
50+31 =
50+6 =
50+8 =
50+10 =
16+50 =
50+11 =
50+14 =
50+37 =
50+16 =
50+7 =
46+50 =
50+9 =
2+50 =
50+28 =
50+23 =
10+50 =
50+32 =
3+50 =
47+50 =
48+50 =
50+17 =
50+19 =
50+20 =
1+50 =
50+21 =
50+22 =
50+1 =
50+25 =
28+50 =
50+15 =
29+50 =
50+33 =
50+34 =
33+50 =
37+50 =
8+50 =
50+43 =
38+50 =
14+50 =
39+50 =
50+35 =
34+50 =
49+50 =
50+36 =
50+42 =
12+50 =
50+44 =
50+46 =
50+38 =
4+50 =
50+40 =
50+47 =
50+45 =
50+39 =
5+50 =
36+50 =
50+48 =
50+49 =
9+50 =
44+50 =
11+50 =
41+50 =
26+50 =
6+50 =
13+50 =
19+50 =
50+41 =
20+50 =
45+50 =
7+50 =
25+50 =
43+50 =
18+50 =
27+50 =
31+50 =
32+50 =
35+50 =
40+50 =
42+50 =
10 SECTION (DOUBLE FIGURES 60+, +60)
60+1 =
60+20 =
24+60 =
30+60 =
12+60 =
60+26 =
13+60 =
26+60 =
14+60 =
60+12 =
32+60 =
60+13 =
21+60 =
60+14 =
60+15 =
35+60 =
60+9 =
60+11 =
34+60 =
60+16 =
60+29 =
31+60 =
60+19 =
60+23 =
23+60 =
60+8 =
60+18 =
25+60 =
60+17 =
60+24 =
3+60 =
60+25 =
60+21 =
15+60 =
60+34 =
10+60 =
60+10 =
60+35 =
5+60 =
38+60 =
39+60 =
60+32 =
6+60 =
60+30 =
60+36 =
36+60 =
1+60 =
60+28 =
60+31 =
2+60 =
4+60 =
60+7 =
8+60 =
11+60 =
60+38 =
16+60 =
60+2 =
28+60 =
60+3 =
7+60 =
60+5 =
60+22 =
60+6 =
17+60 =
18+60 =
60+27 =
60+37 =
20+60 =
60+33 =
33+60 =
19+60 =
60+39 =
9+60 =
22+60 =
27+60 =
60+4 =
29+60 =
37+60 =
11 SECTION (DOUBLE FIGURES 70+, +70)
70+6 =
70+7 =
70+20 =
18+70 =
4+70 =
11+70 =
5+70 =
19+70=
70+3 =
17+70 =
70+8 =
70+10 =
14+70 =
70+11 =
25+70 =
70+12 =
70+21 =
22+70 =
70+9 =
70+22 =
70+1 =
70+23 =
70+26 =
13+70 =
70+27 =
70+29 =
1+70 =
2+70 =
6+70 =
70+18 =
8+70 =
70+4 =
26+70 =
9+70 =
70+14 =
70+15 =
70+25 =
70+16 =
10+70 =
12+70 =
15+70 =
70+2 =
20+70 =
23+70 =
70+5 =
70+24 =
70+28 =
7+70 =
3+70 =
16+70 =
21+70 =
24+70 =
27+70 =
70+13 =
70+17 =
70+19 =
28+70 =
29+70 =
12 SECTION (DOUBLE FIGURES 80+, +80)
80+6 =
14+80=
80+2=
17+80=
80+19 =
80+3 =
80+10 =
80+4 =
15+80=
4+80=
16+80=
80+5 =
80+9 =
80+12 =
11+80=
80+13 =
7+80=
80+14 =
80+1=
18+80=
80+15 =
80+18 =
1+80=
2+80=
5+80=
6+80=
80+16 =
80+17 =
8+80=
13+80=
80+11 =
9+80=
10+80=
80+7 =
3+80=
80+8 =
12+80=
19+80 =
13 SECTION (DOUBLE FIGURES 90+, +90)
3+90 =
1+90 =
90+5 =
90+1 =
8+90 =
90+2 =
90+8 =
90+4 =
90+6 =
2+90 =
4+90 =
5+90 =
90+7 =
90+3 =
6+90 =
90+9 =
7+90 =
9+90 =
2 VARIANT
1 SECTION (NUMBERS 1 – 5)
4+5 =
2+5 =
2+2 =
5+4 =
1+1 =
5+3 =
5+1 =
2+1 =
1+3 =
3+1 =
1+2 =
3+5 =
1+5 =
5+2 =
2 SECTION (NUMBERS 1 – 9)
2+7 =
6+1 =
2+2 =
6+2 =
5+4 =
1+7 =
3+6 =
3+1 =
4+5 =
6+3 =
1+6 =
1+5 =
2+5 =
5+3 =
1+2 =
5+2 =
7+2 =
3+5 =
7+1 =
1+3 =
5+1 =
8+1 =
1+1 =
2+1 =
1+8 =
2+6 =
3 SECTION (NUMBERS 10 – 50)
50+40 =
10+50 =
20+10 =
50+20 =
20+50 =
50+30 =
10+20 =
30+50 =
50+10 =
30+10 =
20+20 =
40+50 =
10+30 =
10+10 =
4 SECTION (NUMBERS 10 – 90)
50+40 =
30+10 =
10+50 =
70+10 =
60+30 =
10+60 =
30+60 =
10+80 =
40+50 =
10+70 =
50+20 =
60+20 =
10+10 =
20+60 =
30+50 =
20+70 =
20+50 =
80+10 =
50+30 =
10+20 =
60+10 =
20+20 =
10+30 =
20+10 =
50+10 =
70+20 =
5 SECTION (DOUBLE FIGURES 10+, +10)
13+10 =
10+44=
10+40=
10+1 =
10+23=
10+24=
10+79=
10+42=
10+6 =
10+8 =
10+43=
4+10 =
10+63=
11+10=
10+41=
10+57=
10+10 =
12+10 =
7+10 =
10+55=
14+10=
15+10 =
10+4 =
10+52=
10+53=
10+54=
10+58=
10+5 =
2+10 =
10+9=
10+29=
10+30=
10+31=
10+34=
5+10 =
10+11 =
10+56=
10+78=
10+85=
10+38=
24+10 =
10+13 =
10+76=
29+10 =
10+69=
1+10 =
3+10 =
10+61=
17+10 =
10+7 =
10+77=
10+80=
10+81=
10+82=
10+60=
10+14 =
19+10 =
10+50=
10+32=
27+10 =
8+10 =
10+17 =
10+20 =
10+22=
10+25=
10+26=
10+33=
10+27=
72+10 =
10+12 =
6+10 =
10+28=
10+18 =
71+10 =
10+19=
10+65=
10+66=
33+10 =
10+35=
10+36=
20+10 =
10+37=
10+88=
10+21=
10+39=
10+45=
10+67=
10+46=
22+10 =
10+47=
25+10 =
10+48=
16+10 =
51+10 =
10+49=
10+70=
10+72=
10+73=
10+74=
28+10 =
10+51=
10+15 =
10+2 =
10+3 =
9+10 =
10+16 =
53+10 =
10+59=
10+62=
10+64=
10+68=
10+75=
10+83=
10+84=
10+86=
10+87=
10+89=
48+10 =
18+10 =
52+10 =
81+10 =
21+10 =
10+71=
41+10 =
23+10 =
69+10 =
35+10 =
77+10 =
26+10 =
30+10 =
38+10 =
84+10 =
74+10 =
68+10 =
32+10 =
36+10 =
56+10 =
37+10 =
39+10 =
44+10 =
89+10 =
31+10 =
80+10 =
45+10 =
47+10 =
63+10 =
82+10 =
64+10 =
34+10 =
46+10 =
55+10 =
57+10 =
78+10 =
40+10 =
58 +10 =
59+10 =
43+10 =
49+10 =
50+10 =
54+10 =
60+10 =
62+10 =
66+10 =
70+10 =
73+10 =
67+10 =
42+10 =
87+10 =
75+10 =
61+10 =
86+10 =
88+10 =
76+10 =
65+10 =
79+10 =
83+10 =
85+10 =
6 SECTION (DOUBLE FIGURES 20+, +20)
17+20 =
19+20 =
7+20 =
20+71 =
20+3 =
20+4 =
9+20 =
20+2 =
20+10 =
20+16 =
20+57 =
20+1 =
20+58 =
20+50 =
20+17 =
20+18 =
20+19 =
18+20 =
20+20 =
20+28 =
21+20 =
6+20 =
20+7 =
8+20 =
20+29 =
58+20 =
20+70 =
59+20 =
11+20 =
22+20 =
20+6 =
13+20 =
20+60 =
20+8 =
20+51 =
20+13 =
20+63=
20+15 =
57+20 =
20+52 =
20+53 =
20+78 =
20+9 =
20+54 =
62+20 =
20+26 =
20+56 =
20+77 =
20+62 =
5+20 =
20+68 =
70+20 =
75+20 =
20+24 =
20+72 =
20+12 =
20+75 =
56+20 =
20+79 =
27+20
69+20 =
1+20 =
20+23 =
3+20 =
77+20 =
65+20 =
20+59 =
4+20 =
10+20 =
20+67 =
76+20 =
20+55 =
20+5 =
15+20 =
14+20 =
20+69 =
16+20 =
73+20 =
20+14 =
79+20 =
54+20 =
20+21 =
2+20 =
20+76 =
23+20 =
28+20 =
50+20 =
63+20 =
20+64 =
20+66 =
24+20 =
51+20 =
20+22 =
20+25 =
71+20 =
20+27 =
72+20 =
53+20 =
20+61 =
74+20 =
20+65 =
55+20 =
26+20 =
20+11 =
12+20 =
20+74 =
25+20 =
60+20 =
67+20 =
20+73 =
29+20 =
61+20 =
64+20 =
52+20 =
66+20 =
68+20 =
78+20 =
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