Vocabulary
The answer to an addition problem
sum
444-222
222
Marco and Mia baked 127 cupcakes. Then Elvin, Jorge and Alfredo stopped by and ate 43 cupcakes and then puked. How many cupcakes are left over?
84 cupcakes
78 + 88
166
Round 46 to the nearest tens place
50
The answer to a subtraction problem
difference
389 - 297
92
Elia, Leif, Estrella, Aisha, Luciana, Briana, Layla and Isabell want to go to Six Flags. Their parents gave them 225 dollars all together. The tickets for everyone costs 162 dollars. How much will they all have left to eat food?
63 dollars
409 + 369
778
round 3,678 to the nearest hundreds place
3,700
The two numbers added together in an addition problem
add-ins
1207 -555
652
Gael and Javier decided to buy Mr. Adranovitz a new house! They saved up 182,000 dollars, but the house cost 212, 509. How much more money do they have to save up to make Mr. Adranovitz the happiest teacher ever?
30,509 dollars
968 + 1,458
2,426
About how much is 3,409 + 4,206
7,600 or 7,000
Changing a number to the nearest place value
rounding
1008 -999
9
Jackie, Ashley and Alexa collect soda caps. Together they have 742 caps. Jackie has 234. Ashley has 387. How many does Alexa have?
121 soda caps
63 + 8,597
8,660
25,947 - 3,898 is about how much?
22,000
an "about" answer
estimate
12007 - 809
11,198
Brody, Ja'kai, Christopher and Jonathan are in a contest to see who can sell the most bottles of their sweat. Brody and Ja'kai sold 47 to their biggest fans. Christopher and Jonathan sold 16 more than Brody and Jakai. How many did they sell all together?
110 bottles of sweat
6,906 + 4,888 + 3,221
15,015
Is 0 a good estimate for the below problem?
196-172
What would be a good estimate?
No, because 0 is never a good estimate and doesn't give us any information.
30 because we would round to the tens place to get a better estimate.