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NUMINO
Activity 3 P. 8 Unit 02. Find the Red Ball
1 . b . 5,500 ; five thousand, five hundred P. 12~13
Numbers 1 to 6 can go in the first blank.
5,050 ; five thousand, fifty Numbers 4 to 9 can go in the second blank.
5,005 ; five thousand, five Numbers 5 to 9 can go in the third blank.
Therefore, 5 and 6 can go in all 3 blanks.
c . 3,300 ; three thousand, three hundred
2 7, 19 , 1 0
3,030 ; three thousand, thirty 99, 1 9, 10
3,003 ; three thousand, three
d . 2,700 ; two thousand, seven hundred Activity 1 P. 14~15
7,200 ; seven thousand, two hundred 1 . 3,123 is greater. When comparing the
2,070 ; two thousand, seventy
7,020 ; seven thousand, twenty thousands place, there are more thousands
2,007 ; two thousand, seven blocks in 3,123 than in 2,645.
7,002 ; seven thousand, two Therefore, 3,123 is the larger number.
Math Story P. 9
1 . eight thousand, eight hundred and 2 . 4,352 > 4,179
fifty meters, 3 . 4,528 4,747
eight thousand, six hundred and
eleven meters, 4,500 4,550 4,600 4,650 4,700 4,750 4,800
eight thousand, five hundred and
eighty-six meters, 4,747 is to the right, which means it is the larger
eight thousand, five hundred and number.
sixteen meters,
eight thousand, four hundred and 4 . 6,520, 6,513
sixty-three meters,
eight thousand, two hundred and Compare from left to right, starting with the
one meters, thousands digit. If there is a difference in the
eight thousand, one hundred and thousands digits, the number with the larger
sixty-seven meters, digit is the larger number. If the thousands
eight thousand, one hundred and digits are the same, move on to the
sixty-three meters, hundreds and compare. When you come to
eight thousand, one hundred and a place value with different digits, the
twenty-five meters, number with the larger digit in that place
eight thousand, ninety-one meters. value is the larger number.
5. a. >
Challenge P. 10~11 b. <
1 . 1001, 1111, 8888, 1881, 8118, 8008
There are six 4-digit mirror numbers.
4-digit mirror numbers are 1001, 1111,
8888, 1881, 8118, and 8008.
Answers 165
NUMINO
Activity 3 P. 8 Unit 02. Find the Red Ball
1 . b . 5,500 ; five thousand, five hundred P. 12~13
Numbers 1 to 6 can go in the first blank.
5,050 ; five thousand, fifty Numbers 4 to 9 can go in the second blank.
5,005 ; five thousand, five Numbers 5 to 9 can go in the third blank.
Therefore, 5 and 6 can go in all 3 blanks.
c . 3,300 ; three thousand, three hundred
2 7, 19 , 1 0
3,030 ; three thousand, thirty 99, 1 9, 10
3,003 ; three thousand, three
d . 2,700 ; two thousand, seven hundred Activity 1 P. 14~15
7,200 ; seven thousand, two hundred 1 . 3,123 is greater. When comparing the
2,070 ; two thousand, seventy
7,020 ; seven thousand, twenty thousands place, there are more thousands
2,007 ; two thousand, seven blocks in 3,123 than in 2,645.
7,002 ; seven thousand, two Therefore, 3,123 is the larger number.
Math Story P. 9
1 . eight thousand, eight hundred and 2 . 4,352 > 4,179
fifty meters, 3 . 4,528 4,747
eight thousand, six hundred and
eleven meters, 4,500 4,550 4,600 4,650 4,700 4,750 4,800
eight thousand, five hundred and
eighty-six meters, 4,747 is to the right, which means it is the larger
eight thousand, five hundred and number.
sixteen meters,
eight thousand, four hundred and 4 . 6,520, 6,513
sixty-three meters,
eight thousand, two hundred and Compare from left to right, starting with the
one meters, thousands digit. If there is a difference in the
eight thousand, one hundred and thousands digits, the number with the larger
sixty-seven meters, digit is the larger number. If the thousands
eight thousand, one hundred and digits are the same, move on to the
sixty-three meters, hundreds and compare. When you come to
eight thousand, one hundred and a place value with different digits, the
twenty-five meters, number with the larger digit in that place
eight thousand, ninety-one meters. value is the larger number.
5. a. >
Challenge P. 10~11 b. <
1 . 1001, 1111, 8888, 1881, 8118, 8008
There are six 4-digit mirror numbers.
4-digit mirror numbers are 1001, 1111,
8888, 1881, 8118, and 8008.
Answers 165
