Estimating Sums and Differences
If you round 543 to the nearest ten, what is the estimated value?
540
What is the next number in the pattern: 5, 10, 15, __ ?
20
Calculate 45 + 28 mentally.
73
Which number is greater: 489 or 894?
894
Which of these numbers are less that 900?
857, 1002, 652, 901
857, 652
Use front-end Estimation. What is the estimated sum of 345 + 212?
300+200=500
What comes next in the pattern: 3, 6, 9, 12, __?
15
Calculate 76 - 39 mentally.
37
If you have 548, 485, and 854, which number is the smallest?
485
Which of these numbers are multiples of 2?
26, 47, 83
26
It is even! 26 divided by 2 is 13.
Round to the nearest 100. Estimate the difference between 876 and 289
900-300=600
Write the pattern rule for the sequence: 20, 25, 30, 35.
The pattern starts at 20 and counts on by 5's.
Forth has 156 pokemon cards and Keen has 247 pokemon cards. How many do they have all together?
156+247=403
153+250=403
Compare 567 and 675 using the correct symbol.
a) >
b) <
c) =
b) < (less than)
25, 134, 88
134
1+3+4 = 8
Estimate the sum of 457 and 598 to the nearest ten.
460+600= 1060
Identify the pattern rule in the sequence: 2, 5, 8, 11.
The pattern starts at 2 and counts on by 3's.
Subtract 89 from 205 using mental math.
205-89=116
206-90=116
Arrange these numbers in from greatest to least: 321, 456, 289.
456>321>289
which of these numbers are multiples of 6?
12, 14, 36
12, 36
By rounding to the nearest ten, what is the estimated difference between 734 and 298?
730-300=430
Create a pattern using multiples of 4 starting from 4.
4, 8, 12, 16
What is the sum of 370, 235, and 107?
370+235+107=712
300+70+200+30+5+100+7=712
300+200+100+70+30+5+7=712
600+100+12=712
712=712
Order 732, 372, 723, and 327 from least to greatest.
327<372<723<732
Which of these numbers are less than 500 and have digits that add to 6?
510, 402, 330, 237
402, 330
4+2=6
3+3=6