100 200 300 400 500 let’s sum it up over or under? what’s the difference? follow the rules grab...
TRANSCRIPT
100 100 100 100 100
200 200200200200
300 300 300 300 300
400 400 400 400 400
500 500 500 500 500
Let’s Sum It Up
Over or Under?
What’s the Difference?
Follow the Rules
Grab Bag
Let’s Sum It Up– 100
Round to the nearest hundred to estimate each sum.
236 + 492 __________
200 + 500= 700
Let’s Sum It Up - 200
Round to the nearest ten to estimate each sum.
18 + 36 _________
20 + 40= 60
Let’s Sum It Up -300
Round to the nearest hundred to estimate each sum.
126 + 223 _______
100 + 200= 300
Let’s Sum It Up- 400
Round to the nearest ten to estimate each sum.
145 + 239 _______
150 + 240= 390
Let’s Sum It Up -500
Estimate the sum.
167 + 449 ________
170 + 450= 620
Over or Under? - 100
Estimate each sum by rounding. Then tell whether each
estimate is an overestimate or an underestimate.
17 + 49 ___________
20 + 50= 70 overestimate
Over or Under? -200
Estimate each sum by rounding. Then tell whether each
estimate is an overestimate or an underestimate.
71 + 13 __________
70 + 10= 80 underestimate
Over or Under? -300
Estimate each sum by rounding. Then tell whether each
estimate is an overestimate or an underestimate.
818 + 139 ________
820+140=960 overestimate
Over or Under? -400
Estimate each sum by rounding. Then tell whether each estimate is
an overestimate or an underestimate.
162+72 ______
160+70=230 underestimate
Over or Under? -500
Estimate each sum by rounding. Then tell whether each
estimate is an overestimate or an underestimate.
164+212 _____
160+210=370 underestimate
What’s the Difference?– 100
Round to the nearest hundred to estimate each difference.
236-119 _______
200-100=100
What’s the Difference?– 200
Round to the nearest ten to estimate each difference.
677-421 ________
680-420 = 260
What’s the Difference?– 300
Round to the nearest hundred to estimate each difference.
558-321 ___________
600-300= 300
What’s the Difference?– 400
Round to the nearest ten to estimate each difference.
296-95 ______
300-100= 200
What’s the Difference?– 500
Remy’s music teacher requires 450 min of practice each
month. Remy practiced 239 min the first three weeks this
month. Estimate how many minutes he has left to practice.
450-240= 210 minutes
Follow the Rule -100
Complete the table. Then write a rule for the table.
Subtract 3 15;0
IN 16 9 4 18 3
OUT 13 6 1
Follow the Rule 200
Complete the table. Then write a rule for the table.
Add 4 16;4
Follow the Rule 300
Jon put in 12 and
got out 17. Then he put in 1 and
got out 6. What rule was he using?
Add 5
Follow the Rule 400
Elton uses the rule Subtract 6 for
his table. If he puts in 18, what will
he get out?
12
Follow the Rule 500
Complete the table. Then write a rule for the table.
Add 10 72;109
IN 16 31 27 62 99
OUT 26 41 37
Grab Bag - 100
(4 + 2) + 1= _____
7
Grab Bag - 200
Complete each fact family
3+6= ___ 9-____=3
6+ ___=9 ____-3=6
3+6=9 9-6=3 6+3=9 9-3=6
Grab Bag - 300
Find the missing number
7 + ______ = 13
7 + 6 = 13
Grab Bag - 400
3 + 0 = 0 + _____
3
Grab Bag - 500
Find the missing number.
8 + ____ = 12
8 + 4 = 12