Estimate
Estimate by rounding each number and adding or subtracting.
44 + 28=?
40+30=70
105 + 3
108
What type of operation (add or subtract) does the word COMBINED usually mean when you see it in a word problem?
add or addition
What is the value of the 8 in this number?
4,781
80
142 - 36
106
Estimate by rounding each number and adding or subtracting.
103 - 56 = ?
100-60=40
160 + 65
225
What type of operation (add or subtract) does the word FEWER usually mean when you see it in a word problem?
subtract or subtraction
What is the value of the 1 in this number?
819,593
10,000
137 - 64
73
Estimate by rounding each number and adding or subtracting.
687 + 1,785 = ?
700 + 2,000= 2,700
124 + 60 + 31
215
What type of operation (+ or -) does the word SUM usually mean when you see it in a word problem?
add or addition
Write this number in expanded form.
46,302
40,000 + 6,000 + 300 +2
249 - 96
153
Estimate by rounding each number and adding or subtracting.
11,084 - 8,417 =?
11,000-8,000= 300
1,283 + 465=?
1,748
What type of operation (+ or -) does the word HOW MANY MORE THAN (comparing to things) usually mean when you see it in a word problem?
subtract or subtraction
Write these in order greatest to least.
61,384 63,895 63,539
63,895 > 63,539 > 61,384
553 - 298
255
Estimate by rounding each number and adding or subtracting.
5,903 + 3,181= ?
6,000 + 3,000 = 9,000
4,972 + 3,297=?
8,269
What type of operation (+ or -) does the word DIFFERENCE usually mean when you see it in a word problem?
Subtract or Subtraction
Write the number in standard form.
four hundred thirty-eight thousand, sixteen
438,016
349 - 109
240