Estimate/Rounding
Round 36 to the nearest ten.
40
25 x 3 =
75
Write 345 in expanded form.
_______ + ______+ _________
300 + 40 + 5
23 x 10 =
230
Mr. Kacur wants to boy each of his 6 math students two Christmas gifts. How many gifts will he need to purchase in all?
6 x 2 = 12 gifts
Round 145 to the nearest hundred.
100
55 x 5 =
275
Write 698 in expanded form.
______+_______+______
600 + 90 + 8
50 x 30 =
1500
Each of Jack's 13 chickens lay 4 eggs each day. How many total eggs do Jack's chickens lay each day?
13 x 4 = 52 eggs
Estimate then multiply.
45 x 61 =
50 x 60 = 3,000
89 x 2 =
178
Write 305 in expanded form.
300 + 5
65 x 26 =
1,690
Mrs. Lobotsky sold 36 Cross Training Exercise Books at $28 each. How much did Mrs. Lobotsky make?
36 x 28 = $1,008
Estimate then multiply.
78 x 57 =
80 x 60 = 4,800
45 x 8 =
360
Write 1,235 in expanded form.
1,000 + 200 + 30 + 5
79 x 12 =
948
There are 83 elves who load-up Santa's sleigh on Christmas Eve. Each elf loads 50 presents onto the sleigh. How many total presents are loaded onto Santa's sleigh?
83 x 50 = 4,150 presents
Estimate and then multiply.
99 x 12 =
100 x 10 =1,000
99 x 5 =
495
Write 23,865 in expanded form.
20,000 + 3,000 + 800 + 60 + 5
87 x 35 =
3,045
Santa's reindeer eat 24 carrots each before they fly on Christmas Eve. If there are 8 reindeer plus Rudolph, how many total carrots do Santa's reindeer eat on Christmas Eve?
24 x 9 = 216 carrots