It is the first step for children to formally enter primary schools, so parents attach great importance to it, especially in some primary schools. The interview made parents not know where to prepare. Is the calculation required to be within 10 or 20? The following is my list of formulas for addition and subtraction within 20. I hope you can read it carefully!
addition formula
1+ 1= 2
1+ 2= 3
2+ 2= 4
1+ 3= 4
2+ 3= 5
3+3= 6
1+ 4= 5
2+ 4= 6
3+4= 7
4+ 4= 8
1+ 5= 6
2+ 5= 7
3+5= 8
4+ 5= 9
5+ 5= 10
1+ 6= 7
2+ 6= 8
3+6= 9
4+ 6= 10
5+ 6= 1 1
6+ 6= 12
1+ 7= 8
2+ 7= 9
3+7= 10
4+ 7= 1 1
5+ 7= 12
6+ 7= 13
7+ 7= 14
1+ 8= 9
2+ 8= 10
3+8= 1 1
4+ 8= 12
5+ 8= 13
6+ 8= 14
7+ 8= 15
8+ 8= 16
1+ 9= 10
2+ 9= 1 1
3+9= 12
4+ 9= 13
5+ 9= 14
6+ 9= 15
7+ 9= 16
8+ 9= 17
9+ 9= 18
0 1+ 10= 1 1
2+ 10= 12
3+ 10= 13
4+ 10= 14
5+ 10= 15
6+ 10= 16
7+ 10= 17
8+ 10= 18
9+ 10= 19
10+ 10=2
Addition formula nursery rhymes
One plus one equals two.
One plus two equals three two plus two equals four.
One plus three equals four two plus three equals five three plus three equals six.
One plus four equals five two plus four equals six three plus four equals seven four plus four equals eight.
One plus five equals six two plus five equals seven three plus five equals eight four plus five equals nine five plus five equals ten.
One plus six equals seven two plus six equals eight three plus six equals nine four plus six equals fifteen plus six equals eleven six plus six equals twelve.
One plus seven equals eight two plus seven equals nine three plus seven equals fourteen plus seven equals eleven five plus seven equals twelve six plus seven equals thirteen seven plus seven equals fourteen.
One plus eight equals 92 plus eight equals thirteen plus eight equals eleven four plus eight equals twelve five plus eight equals thirteen six plus eight equals fourteen seven plus eight equals fifteen eight equals sixteen.
One plus nine equals twelve plus nine equals eleven three plus nine equals twelve four plus nine equals thirteen five plus nine equals fourteen six plus nine equals fifteen seven plus nine equals sixteen eight plus nine equals seventeen nine plus nine equals eighteen.
Formula table of addition and subtraction within 20
Addition formula within 10
1+ 1= 2
1+ 2= 3 2+ 2= 4
1+ 3= 4 2+ 3= 5 3+
3= 6
1+ 4= 5 2+ 4= 6 3+
4= 7 4+ 4= 8
1+ 5= 6 2+ 5= 7 3+
5= 8 4+ 5= 9 5+ 5= 10
1+ 6= 7 2+ 6= 8 3+
6= 9 4+ 6= 10 5+ 6= 1 1 6+ 6= 12
1+ 7= 8 2+ 7= 9 3+
7= 10 4+ 7= 1 1 5+ 7= 12 6+ 7= 13 7+ 7= 14
1+ 8= 9 2+ 8= 10 3+
8= 1 1 4+ 8= 12 5+ 8= 13 6+ 8= 14 7+ 8= 15 8+ 8= 16
1+ 9= 10 2+ 9= 1 1 3+
9= 12 4+ 9= 13 5+ 9= 14 6+ 9= 15 7+ 9= 16 8+ 9= 17 9+ 9= 18
1+ 10= 1 1 2+ 10= 12
3+ 10= 13 4+ 10= 14 5+ 10= 15 6+ 10= 16 7+ 10= 17 8+ 10= 18 9+ 10= 19
10+ 10=20
Add the formula within 20 minutes.
1+ 1 1= 12 2+ 1 1= 13
3+ 1 1= 14 4+ 1 1= 15 5+ 1 1= 16 6+ 1 1= 17 7+ 1 1 = 18 8+ 1 1= 19 9+ 1 1=20
1+ 12= 13 2+ 12= 14
3+ 12= 15 4+ 12= 16 5+ 12= 17 6+ 12= 18 7+ 12= 19 8+ 12=20
1+ 13= 14 2+ 13= 15
3+ 13= 16 4+ 13= 17 5+ 13= 18 6+ 13= 19 7+ 13=20
1+ 14= 15 2+ 14= 16
3+ 14= 17 4+ 14= 18 5+ 14= 19 6+ 14=20
1+ 15= 16 2+ 15= 17
3+ 15= 18 4+ 15= 19 5+ 15=20
1+ 16= 17 2+ 16= 18
3+ 16= 19 4+ 16=20
1+ 17= 18 2+ 17= 19
3+ 17=20
1+ 18= 19 2+ 18=20
1+ 19=20
/kloc-subtraction within 0/0
1- 1=0
2- 1= 1
2-2=0
3- 1=2
3-2= 1
3-3=0
4- 1=3
4-2=2
4-3= 1
4-4=0
5- 1=4
5-2=3
5-3=2
5-4= 1
5-5=0
6- 1=5
6-2=4
6-3=3
6-4=2
6-5= 1
6-6=0
7- 1=6
7-2=5
7-3=4
7-4=3
7-5=2
7-6= 1
7-7=0
8- 1=7
8-2=6
8-3=5
8-4=4
8-5=3
8-6=2
8-7= 1
8-8=0
9- 1=8
9-2=7
9-3=6
9-4=5
9-5=4
9-6=3
9-7=2
9-8= 1
9-9=0
10- 1=9
10-2=8
10-3=7
10-4=6
10-5=5
10-6=4
10-7=3
10-8=2
10-9= 1
10- 10=0
Subtraction within 20
1 1- 1= 10
1 1-2=9
1 1-3=8
1 1-4=7
1 1-5=6
1 1-6=5
1 1-7=4
1 1-8=3
1 1-9=2
1 1- 10= 1
12-2= 10
12-3=9
12-4=8
12-5=7
12-6=6
12-7=5
12-8=4
12-9=3
12- 10=2
13-3= 10
13-4=9
13-5=8
13-6=7
13-7=6
13-8=5
13-9=4
13- 10=3
14-4= 10
14-5=9
14-6=8
14-7=7
14-8=6
14-9=5
14- 10=4
15-5= 10
15-6=9
15-7=8
15-8=7
15-9=6
15- 10=5
16-6= 10
16-7=9
16-8=8
16-9=7
16- 10=6
17-7= 10
17-8=9
17-9=8
17- 10=7
18-8= 10
18-9=9
18- 10=8
19-9= 10
19- 10=9
20- 10= 10
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