Suma
Resta
Redondear
Ecuaciones
Resolver
100
456+321=
777
100
347-124=
223
100
Que es la decena mas cercas 238
240
100
Easten tiene 50 dulces en una bolsa. 20 dulces son jolly ranchers. 10 son starburst. El resto de los dulces son chocolate.
chocolate= c
Escribe una ecuacion
50-(10+20)=c
20+10+c=50
100
A classroom has 30 desks. There are 15 students who show up up and then 12 more students show up to class. How many empty seats are there?
3 empty seats
200
539+232=
771
200
468-248=
220
200
Cual es la centena mas cercas 485
500
200
Hay 87 lapices de colores en una bolsa. Hay 5 estudiantes que toman cada uno 4 lapices de la bolsa. El numero de lapices que quedan en la bolsa es r.
Que igualdad representa la situacion?
p=87-(5x4)
200
A theater has 250 seats. They've sold 185 tickets so far. How many tickets are still available?
65 tickets
300
198+785=
983
300
567-193=
374
300
Cual es la decena y centena mas cercas 750
nearest tens: 750
nearest hundreds: 800
300
En el auditorio hay asientos para 200 estudiantes. En la representacion participan 78 estudiantes de la escuela de Andrew y 54 estudiantes de la escuela de Henry.
Cuantos asientos vacios hay?
200-(78+54)=
200-132= 68
68 asientos vacios
300
Explain or show why this happens. Why is there a diagonal line?
The sums are the same because they all have numbers which added up to the sum. For example 4+1 or 1+4=5, and 2+3 or 3+2=5.
400
978+549=
1,527
400
550-253=
297
400
Cual es la decena y centena mas cercas 245
decena: 250
Centena: 200
400
En el auditorio hay asientos para 100 estudiantes. En la representacion participan 20 estudiantes de la clase de Ximena y 14 estudiantes de la clase de Ana.
Cuantos asientos vacios hay?
100-(20+14)=
100-34=66
400
There are seats for 400 students in the auditorium. There are 121 students from Anthony's school and 180 students from Jaylah's school at the performance.
Jaylah estimates that there will be about 100 empty seats. Do you agree with Jaylah? explain or show your reasoning.
I agree with Jaylah because if we add 121+180= 301 students.
400-301=99 which is close to Jaylah's estimate of 100
500
356+768=
1,124
500
900-427=
473
500
Que es la centena y decena mas cercas 304
nearest tens: 300
nearest hundreds: 300
500
A bag has 60 crayons. 4 students each take 5 crayons. Then, the teacher adds 12 more crayons. How many crayons are in the bag now?
60 - (4x5) + 12 = c
500
There are seats for 800 students in the auditorium. There are 234 students from Madeline's school and 356 students from Sofie's school at the performance.
Sofie estimates that there will be about 100 empty seats. Do you agree with Sofie? explain or show your reasoning.
I disagree with Sofie because when you add the amount of students together 234+356= 590. Then, if we subtract 800-590=210 which is a lot more than the estimated 100 empty seats Sofie said.