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Addition & Subtraction
Four Addend Addition
CM
Estimation and subtraction
Mystery
100
85 + 19
80 + 10 = 90 5 + 9 = 14 90 + 14 = 104
100
23 + 17 + 25 + 30 = ?
20 + 10 +20 +30 = 80 3 + 7 + 5 + 0 = 15 80 + 15 = 95
100
The eraser is 7 cm. long, and the pen is 17 cm. long. How much shorter is the eraser than the pen?
17 - 7 = 10 cm.
100
If your pencil is 5 inches long, about how long do you think a journeys book is? A. 12 inches B. 3 feet C. 2 yards
A. 12 inches
100
57 + 18 = ?
75
200
38 + 62 = ?
30 + 60 = 90 8 + 2 = 10 90 + 10 = 100
200
33 + 41 + 17 + 50 =
30 + 40 + 10 + 50 = 130 3 + 1 + 7 + 0 = 11 130 + 11 = 141
200
Billy has a colored pencils that are 17 cm, 20 cm, 12 cm, and 24 cm. If they are lined up end to end, what is the total length?
17 + 20 + 12 + 24 = ? 10 + 20 +10 + 20 = 60 7 + 0 + 2 + 4 = 13 60 + 13 = 73 cm.
200
Take a look at a marker in the classroom. What is the best estimate or guess as to how long it is in inches? A. 6 inches B. 12 inches C. 3 yards D. 20 cm.
A. 6 inches
200
44 - 22 = ?
22
300
75 - 27 = ?
70 - 20 = 50 50 + 5 = 55 55 - 7 = 48
300
20 + 31 + 17 + 28 = ?
20 + 30 + 10 + 20 = 80 0 + 1 + 7 + 8 = 16 80 + 16 = 96
300
Donna caught a fish that was 35 cm long, and Jake caught a fish that was 47 cm long. How much longer is Jake's fish than Donna's?
47 - 35 = ? 40 - 30 = 10 7 - 5 = 2 10 + 2 = 12
300
Mr. Cappello measured his paper to be 10 inches. If he lines a similar piece of paper next to the one he measured, about how long would both pieces of paper be together? A. 33 inches B. 20 inches C. 14 inches
B. 20 inches. 10 + 10 = 20 inches
300
524 - 21 =
503
400
564 - 234 =
500 - 200 = 300 60 - 30 = 30 4 - 4 = 0 300 + 30 = 330
400
41 + 13 + 25 + 36 = ?
40 + 10 + 20 + 30 = 100 1 + 3 + 5 + 6 = 15 100 + 15 = 115
400
Tyrell, Gage, Jazlyn, and Amia have strips of paper that measure 13 cm, 23 cm, 18 cm, and 33 cm. If the papers are lined up end to end, what is the total length of the papers?
13 + 23 + 18 + 33 = ? 10 + 20 + 10 + 30 = 70 3 + 3 + 8 + 3 = 17 70 + 17 = 87
400
About how many feet is the length of a student's desk? a. 5 feet b. 3 feet c. 6 feet d. 1 foot
d. 1 foot
400
34 + 16 + 17 + 20 =?
30 + 10 + 10 + 20 = 70 4 + 6 + 7 +0 = 17 70+ 17 = 77
500
687 - 454 = ?
600 - 400 = 200 80 - 50 = 30 7 - 4 = 3 200 + 30 + 3 = 233
500
45 + 32 + 18 + 37 = ?
40 + 30 + 10 + 30 = 110 5 + 2 + 8 + 7 = 22 110 + 22 = 132
500
Billy wrote note that was 64 cm long. Jane wrote a note that is 35 cm long. How much longer is Billy's not than Jane's?
64 - 35 = ? 60 - 30 = 30 30 + 4 = 34 34 - 5 = 29 cm
500
345 - 123 = ?
300 - 100 = 200 40 - 20 = 20 5 - 3 = 2 200 + 20 + 2= 222
500
456 + 278 = ?
400 + 200 = 600 50 + 70 = 120 6 + 8 = 14 600 + 120 + 14 = 734