Answer key · Set C
Reading numbers over a hundred thousand
1twelve thousand four hundred seven The thousands group is 12 and the ones group is 407: twelve thousand four hundred seven.
2206850 The thousands group is 206 and the ones group is 850: 206,850.
3900070 The thousands group is 900 and the ones group is 070, with zeros holding the empty places: 900,070.
4200 350,206 has 3 hundred-thousands, 5 ten-thousands, 2 hundreds and 6 ones, so the missing part is 200.
57000 407,019 has 4 hundred-thousands, 7 thousands, 1 ten and 9 ones, so the missing part is 7,000.
63 638,254 is 6 hundred-thousands, 3 ten-thousands and 8 thousands. The 3 is in the ten-thousands place.
7True The 5 in 502,310 is 500,000 and the 5 in 50,231 is 50,000. 500,000 is ten times 50,000.
8> The thousands groups match. Compare the ones groups: 150 and 105. Both have 1 hundred, and 5 tens is more than 0 tens.
9101,234 101,234 has 6 digits and the other two have 5 digits. The number with more digits is greater.
101, 4, 2, 3 300,501 and 300,150 have 6 digits (501 is more than 150). Then 30,951 has 5 digits and 3,951 has 4.
1171000 71 thousands is 71 in the thousands group and 000 in the ones group: 71,000.
121-A, 2-C, 3-B, 4-D
13Your own words: a grown-up reads it.
Mark each answer, count the right ones and write the score on the sheet.