Count forward by 10s to fi ll in the missing numbers. 8,_____, 28,_____, _____, 58, _____, _____, _____, 98, _____, _____, 128
18, 38, 48, 68, 78, 88, 98, 108
10 + 7 =
17
17 - 7 =
10
Use the number line to find the difference. Show your thinking. 53 – 8 = _______
Work on number line varies.
53 - 8 = 45
Jessie and the triplets are going to make some more seed bead bracelets. They have 15 red seeds, 24 blue seeds, 26 black seeds, and 25 green seeds. How many seeds are there in all? Show your thinking.
90
Count backward by 10s to fi ll in the missing numbers. 135, 125, _____, 105, _____, 85, _____, _____, _____, 45, _____, 25, _____, 5
115, 95, 75, 65, 55, 35, 15
14 - 7 =
7
8 + 8 =
16
Find the sum. Show your thinking. 46 + 37 = _______
Work will vary.
46 + 37 = 83
It takes 10 seeds to make each bracelet. If Gabby uses 100 seeds, how many bracelets can she make? Show your thinking.
10
Salvador has three lucky numbers: 12, 65, and 84. Mark and label each of Salvador’s lucky numbers on the number line.
x x x
10 - 8 =
2
27 + 16 =
43
Find the difference. Show your thinking.
65 – 29 = _______
Work will vary.
65 - 29 = 36
157 - 68 =
89
A bundle is worth 10. The total value of this collection of sticks is ______.
78
12 - 0 =
40 - 29 =
11
Elisa is 25 years old. She has a cousin who is 12 years older. How old is Elisa’s cousin? Show your thinking.
37
486 + 154 =
640
The total value of this base ten collection is ______.
66
9 + 9 =
18
6 - 5 =
1
Mateo is 36 inches tall. His dad is 78 inches tall. How many inches taller is Dad than Mateo? Show your thinking. You can use the number line to help, but you don’t have to.
42
491 + ______ = 1000