Follow Up
What to do
1)Use the strategy of splitting a number into parts to do these additions.
2) Do the problems in your head first.
3) Check you are correct by writing them down. Show them like the examples above.
1) 28 + 14 = 42
20 + 10 = 30
8 + 2 = 10
10 + 30 = 40
40 + 2 = 42
2) 76 + 9 = 85
6 + 4 = 10
10 + 70 = 80
80 + 5 = 85
3) 37 + 15 = 52
30 + 10 = 40
7 + 3 = 10
10 + 40 = 50
50 + 2 = 52
4) 46 + 17 = 63
40 + 10 = 50
6 + 4 = 10
50 + 10 = 60
60 + 3 = 63
5) 68 + 24 = 92
60 + 20 = 80
8 + 2 = 10
80 + 10 = 90
90 + 2 = 92
6) 48 + 37 = 81
40 + 30 = 70
8 + 2 = 10
70 + 10 = 80
80 + 1 = 81
7) 29 + 62 = 91
20 + 60 = 80
9 + 1 = 10
80 + 10 = 90
90 + 1 = 91
8) 18 + 63 = 81
10 + 60 = 70
8 + 2 = 10
70 + 10 = 80
80 + 1 = 81
9) 55 + 17 = 72
50 + 10 = 60
5 + 5 = 10
60 + 10 = 70
70 + 2 = 72
10) 29 + 54 = 83
20 + 50 = 70
9 + 1 = 10
70 + 10 = 80
80 + 3 = 83
(11) 38 + 17 = 55
30 + 10 = 40
8 + 2 = 10
10 + 40 = 50
50 + 5 = 55
(12) 37 + 54 = 91
30 + 50 = 80
7 + 3 = 10
80 + 10 = 90
90 + 1 = 91
13) 69 + 73 = 142
60 + 70 = 130
9 + 1 = 10
130 + 10 = 140
140 + 2 = 142
(14) 78 + 45 = 123
70 + 40 = 110
8 + 2 = 10
110 + 10 = 120
120 + 3 = 123
(15) 27 + 57 = 84
20 + 50 = 70
7 + 3 = 10
70 + 10 = 80
80 + 4 = 84
16) 19 + 64 = 83
10 + 60 = 70
9 + 1 = 10
70 + 10 = 80
80 + 3 = 83
(17) 27 + 46 = 73
20 + 40 = 60
7 + 3 = 10
60 + 10 = 70
70 + 3 = 73
(18) 38 + 75 =113
30 + 70 = 100
8 + 2 = 10
100 + 10 = 110
110 + 3 = 113
19) 47 + 86 = 133
40 + 80 = 120
7 + 3 = 10
120 + 10 = 130
130 + 3 = 133
(20) 34 + 68 = 102
30 + 60 = 90
4 + 6 = 10
90 + 10 = 100
100 + 2 = 102
(21) 58 + 86 = 144
50 + 80 = 130
8 + 2 = 10
130 + 10 = 140
140 + 4 = 144
22) 74 + 38 = 112
70 + 30 = 100
8 + 2 = 10
100 + 10 = 110
110 + 2 = 112
(23) 95 + 29 = 124
90 + 20 = 110
5 + 5 = 10
110 + 10 = 120
120 + 4 = 124
(24) 88 + 36 = 124
80 + 30 = 110
8 + 2 = 10
110 + 10 = 120
120 + 4 = 124
