Addition with and without regrouping
15 + 24 =
39
Regroup the ones.
5 tens and 10 ones
______ tens ______ ones
6 tens and 0 ones
Add 20 to each number in the pattern
11, 21, 31, 41
31, 41, 51, 61
There were 48 students in the talent show. 12 more decided to join. How many students are going to be in the talent show?
60
19 + 10 + 2
31
77 + 34 =
111
Regroup
8 tens and 18 ones
9 tens and 8 ones
round each number to the nearest ten
67 + 22
70 and 20
Lucy has 35 pieces of candy leftover from halloween. Victoria has 36 pieces of candy leftover from halloween. If they combined all of their candy how many pieces of candy would they have?
71 pieces of candy.
28 + 20 + 31
79
78 + 45
123
Round these numbers to the nearest 10.
23, 34, 45, 66
20, 30, 50, 70
Regroup ones as tens. Come up and draw a picture.
7 tens and 12 ones
8 tens and 2 ones
Luca collects 27 shells at the beach. Aurelia and Grace collect 26 shells each. How many shells did Luca, Aurelia and Grace all collect?
79 shells.
Which answer is bigger
14+ 32+ 24 or 10 + 5 + 20 + 18
14 + 32 + 24 = 70
10+5+20 +18 = 53
89 + 89
178
solve the original problem then round all the numbers to the nearest ten and solve the problem with your new rounded numbers.
24 + 37 = ______
____ + _____ = _______
61
20 + 40 = 60
Add 2 to the pattern
27, 37, 47,57
29, 39, 49, 59
Chris draws 17 pictures during art class. Marshall draws 12 more pictures than Chris. How many pictures do they draw in all?
46 Pictures
30 + 24 + 12+ 7
73
32 + 18 + 10 =
60
Leah and Kevin are making seashell crafts. Leah needs 55 shells. Kevin needs 34 shells. They can buy shells in packs of 10 or buy single shell. How many packs of ten shells and how many single shells do they need?
Give me two different ways they could buy the shells they need.
_____ packs of 10 and ______ single shells.
_____ packs of 10 and _____ single shells.
Round all of these numbers to the nearest ten
45
33
29
6
26
37
50 , 30 , 30 , 10, 30, 40
Henry buys 42 labubus. Quinn buys 23 labubus. Then Henry goes and buys 10 more labubus. How many labubus did Henry and Quinn buy in all?
75 Labubus
Which problem has the biggest answer
12 + 23 + 44+ 35 =
33 + 16 + 15 + 62 =
114
126 The second problem ( 33+16+15 + 62) is bigger.