Addition Within 100
23
+31
54
Use a hundred chart to solve.
34+24
58
43+28=
71
Break apart to solve.
45+32
4 5 + 3 2
/ \ / \
40 5 30 2
40+30=70
5+2=7
70+7=77
Dan ran 34 yards on the football field. In the next play, he ran 22 more yards. How many yards did Dan run in all?
34+22=56
56 yards
47
+39
86
Use a hundred chart to solve.
27+43
70
Solve using an open number line.
37+48
85
Break apart to solve.
53+37
5 3 + 3 7
/ \ / \
50 3 30 7
50+30=80
3+7=10
80+10=90
Addie has 46 red marbles and 28 blue marbles.How many marbles does Addie have? Break apart the numbers. Show how to add the tens and ones.
46+28
40+20=60
6+8=14
60+14=74
What is the missing addend?
41+___=67
26
Use a hundred chart to solve.
21+47+18
86
Solve using an open number line.
45+32
77
Break apart to solve.
48+49
4 8 + 4 9
/ \ / \
40 8 40 9
40+40=80
8+9=17
80+17=97
Nick has 54 pennies. Adrienne has 46 more pennies than Nick. How many pennies does Adrienne have?
54+46=100
What is the missing addend?
72=___+39
33
Use a hundred chart to solve.
32+7+16+21
76
Solve using an open number line.
75+ 23
98
Break apart to solve.
12+43+32
1 2 + 4 3 + 3 2
/ \ / \ / \
10 2 40 3 30 2
10+40+30=80
2+3+2= 7
80+7=87
Alex has 46 marbles. He gives away 20 of them. Then he buys 10 more marbles. How many marbles does he have now?
46-20= 26
26+10=36
Solve.
29+41+37=
97
Use a hundred chart to find the missing addend.
78=___+34
44
Solve using an open number line.
23+43+31
97
Break apart to solve.
22+34+39
2 2 + 3 4 + 3 9
/ \ / \ / \
20 2 30 4 30 9
20+30+30=80
2+4+9=15
80+15=95
Ken has 45 stamps. He uses 20 stamps. Then he buys 7 more stamps. How many stamps does he have now?
45-20=25
25+7=32