Mental Math Worksheet: Counting to 300 and Number Bonds

Homework – Mental Math
Week
12
A
 Count orally up to 300.
Recite numbers one by one from 199 to 250.
 Know number bonds to the next ten.
Dictation: How much must be added to 3 to get 10? 56→60, 14→20, 44→50, 52→60,
88→90,
1→10, 33→40, 47→50, 61→70
Answers: 7, 4, 6, 6, 8, 2, 9, 7, 3, 9
B
 Count orally up to 300.
Recite numbers one by one from 250 to 300.
 Learn number bonds to the next ten
Dictation: 15+…=20, 56+…=60, 83+…=90, 2+…=10, 34+…=40,
79+…=80, 18+…=20, 33+…=40, 66+…=70, 87+…=90
Answers: 5, 4, 7, 8, 6, 1, 2, 7, 4, 3
C
 Count orally up to 300.
Count backwards, one by one, from 293 to 256
 Know number bonds to the next ten
Dictaon: 60 – 56 (60 minus 56 equals), 50 − 48, 100 − 95, 80 − 79, 70 − 63, 80 − 77, 20 −
18, 40 − 34, 70 − 65
Answers: 4, 2, 5, 1, 7, 3, 2, 6, 5
D
 Count orally up to 300.
Count backwards, one by one, from 300 to 270
 Know number bonds to the next ten
Dictaon: 54+... =60, 67+...=70, 32+...=40, 85+...=90, 12+...=20, 48+...=50, 45+...=50,
73+...=80, 28+...=30, 59+...=60
Answers: 6, 3, 8, 5, 8, 2, 5, 7, 2, 1
Week
13
A
 Add 10
Dictation: 5+10, 2+10, 57+10, 19+10, 28+10, 55+10, 65+10, 47+10, 9+10, 39+10
Answers: 15, 12, 67, 29, 38, 65, 75, 57, 19, 49
 Subtract 10
Dictation: 29−10, 38−10, 54−10, 46−10, 48−10, 68−10, 70−10, 53−10, 91−10, 97−10
Answers: 19, 28, 44, 36, 38, 58, 60, 43, 81, 87
B
 Review number bonds to the next ten
Dictation:
How much must be added to 65 to make 70?
to 83 to make 90?
to 92 to make 100?
to 24 to make 30?
to 78 to make 80?
Answers: 5, 7, 8, 6, 2
 Add or subtract 10 from a 3-digit number
Dictation: 124+10, 161+10, 185+10, 10+157, 125−10, 172−10, 198−10, 176−10
Answers: 134, 171, 195, 167, 115, 162, 188, 166
C
 Review number bonds to the next ten
Dictation: 39+?=40, 22+?=30, 71+?=80, 64+?=70
Answers: 1, 8, 9, 6
 Add or subtract 10 from a 3-digit number
Oral problems:
Sophie is 32 years old. How old will she be in 10 years?
32+10 = 42 years

Léa has 85 euros in her purse. She has 10 euros less than Nina.
How much money does Nina have?
85+10 = 95 euros
D
 Review number bonds to the next ten
Dictation: 55+? = 60, 72+? = 80, 93+? = 100, 68+? = 70
Answers: 5, 8, 7, 2
 Add or subtract 10 from a 2-digit or 3-digit number
Dictation: 125+10, 59+10, 48+10, 144+10, 89+10, 125−10, 59−10, 187−10, 51−10, 96−10
Answers: 135, 69, 58, 154, 99, 115, 49, 177, 41, 86