Subtract Tens
80-30=?
50
8-3=5
add the 0!
Start at 65. Jump back 20. Where do you land?
45
Break apart 24 into tens and ones.
20+4
70-40=
30
There are 50 cookies. You eat 20. How many are left?
30 cookies
76-20=?
56
Start at 78. Jump back 30, then 5. Where do you land?
43
Solve 56 − 23 by subtracting tens, then ones.
33
85-32=
53
Mia has 68 stickers. She gives away 24. How many remain?
44 stickers
95-40=?
55
Use a number line to solve 82 − 24.
Solve 78 − 35 by decomposing 35.
43
63-29=
34
There are 82 cupcakes. The baker sells 37. How many remain?
45 cupcakes
64-30=
34
Use a number line to solve 73 − 38.
35
Solve 62 − 27 by breaking apart 27.
35
A student says 72 − 25 = 53. Find the mistake and correct it.
47. After 72 − 20 = 52, subtract 5 to get 47.
Our class has 75 pencils. We give away 28. How many are left?
47 pencils
90−60=
30
Start at 91. Jump back 40, then 7. Where do you land?
44
Solve 94 − 48 using a subtraction strategy.
46
Solve 91 − 46 and explain your strategy.
45. For example, subtract 40 to get 51, then subtract 6 to get 45.
A bakery makes 90 cookies. It sells 26 in the morning and 18 in the afternoon. How many are left?
46 cookies