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Pronuncing numbers
Rounding numbers
Operating numbers
Combined operations
Word problems
100
How do you say 678 in English?
Six hundred and seventy-eight
100
Round the following number to the nearest hundred: 152
The result is 200
100
Do the following operation: 1,278 + 567
The result is 1,845.
100
Solve the following combined operation: 1 + 2 · (4 : 2 - 1)
We obtain 3.
100
Three friends have € 1,300 and they spend € 655 on a trip. How much does each one have left after the trip?
Each one has 645 Euros after the trip.
200
The number 4,920 is pronounced like:
Four thousand nine hundred and twenty
200
Can you round 23,999 to the nearest ten-thousand?
The rounded number is 20,000.
200
What is the result of 2,341 minus 876?
The result of the operation is 1,465.
200
Do the following operation 7 · 3 - [ 5 · 2 - ( 3 · 4 - 8 : 2) ]
We obtain 19
200
Milo has bought 10 tickets for the theatre and Gloria buys another 8 for the pupils who have decided to come at the last minute. How much do they have to pay between them if each tickets costs € 9?
They have to pay 162 Euros.
300
"A man has 23,786 Euros in his bank account" Repeat this sentence:
A man has twenty-three thousand seven hundred and eighty-six Euros in his bank account.
300
Round 1,467,899 to the nearest hundred-thousand.
The rounded number is 1,500,000
300
What do you obtain when you multiply 234 by 76 and the result by 23?
The result is 409,032
300
Solve the following combined operation: [ ( 425 + 680 - 142 ) x 12 ] : 107
The result is 108
300
John has saved 350 euros in his bank account. He has received 37 Euros as a birthday present and then, he has bought 4 DVDs which cost € 15 each. How much money does he have now?
He has 327 Euros now
400

Can you pronounce the following number in English and in Spanish? 9,567,871

In English: Nine million, five hundred and sixty-seven thousand, eight hundred and seventy-one. In Spanish: Nueve millones quinientos sesenta y siete mil ochocientos setenta y uno

400
Round to the nearest million and to the nearest thousand: 23,999,999 What can you observe?
To the nearest million: 24,000,000 To the nearest thousand: 24,000,000 We can observe that both rounding are equal.
400
Do the following division: 80,475 : 925
The result of the division is 87.
400
Solve the following combined operation: 5 - 4 · [ 3 · 7 - ( 2 · 3 - 6 : 6) · (22 - 9 · 2)] + (6 - 4) · 2
The result is 5.
400
Brad drove 72 kilometers in one hour. About how many kilometers can he drive in 8 hours?
He can drive 576 km in 8 hours
500

Pronounce in English and in Spanish: 444,999,666

In English: Four hundred and forty-four million, nine hundred and ninety-nine thousand, six hundred and sixty-six. In Spanish: Cuatrocientos cuarenta y cuatro millones, novecientos noventa y nueve mil seiscientos sesenta y seis

500
Imagine you buy a house and the price of the house is 215,589 Euros. One day you are talking to some friends and you tell them about the house. You say: "The house cost me 200,000 Euros more or less" Another day you are talking to your parents and you tell them about the house. You say: "The house cost me 220,000 Euros more or less" Which is the best rounding for the price of the house?
The best rounding is the second one, the price that you tell to your parents. This is because it aproximates better the real price of the house.
500
Divide 643,270,528 by 6,514.
The result is 98,752.
500
Do the following operation: 1 + 2 · ( 2 + 3 ) + [ ( 4 - 2 )·( 13 - 5 ) - ( 4 · ( 2 + 1 )) ] - 5 · 3
The result is 0
500
A travel club is spending a weekend in the city. The trip cost is $96, and it is divided into three equal payments. How much is each payment?
Each payment is 32 Euros