Write and Solve the Number Sentence
Estimate or Use Mental Math to solve!
Rounding
Random
Are Both Sides Equal?
100
Elmer had 20 footballs. He gave 10 to Dustin. How many footballs does Elmer have now?
Elmer has 10 footballs left.
100
Estimate the difference of this subtraction equation. 23-9=?
20-10=10
100
Round to the nearest ten. 32
30
100
Order these numbers from least to greatest. 17, 32, 5
5, 17, 32
100
Balance this equation 4+n=8
4
200
Ms. Gray had to swim 1000 yards. She has swam 700 yards so far. How many yards does she have left to swim?
Ms. Gray has 300 yards left to swim.
200
Use mental math to solve this addition equation. 27+98=?
90+20=110 7+8=15 110+15=125
200
Round to the nearest 10 762
760
200
Add this equation. 45+89=?
134
200
12+n=24
12
300
Dayton has a pet frog. He eats 16 flies every day. He has 2 flies left to eat after lunch. How many flies has Dayton's pet frog eaten today?
14 Flies!
300
Estimate this addition equation. 456+729=?
500+700=1200 Or... 450+720=1170
300
Round this number to the nearest hundred. 543
500
300
Add this equation 908+123=?
1031
300
8=12-n
4
400
Jose smiled at 3 girl and 7 teachers. How many people did Jose smile at all together?
10 people.
400
Use mental math to solve this problem. 151 + 987 =?
Use mental math to solve this problem. 151 + 987 =? 100+900=1000 50+80=130 7+1=8 1000+130+8=1138
400
1400 Round this number to the nearest hundred. 1395
1400
400
Subtract this equation. 100-67=?
33
400
15=9+n
6
500
Jolene wants to catch all 150 poke'mon. She has 47 so far. How many more poke'mon does she need to catch?
103 poke'mon.
500
Estimate the equation. 231-169=?
230-170=60
500
Round to the nearest ten. 1234
1230
500
Multiply. 13284 X 0 =?
0
500
Balance this equation 3+4=9-n
2
M
e
n
u