WORKED EXAMPLES · 1
Keep each part in its place
Skill: write a number from its parts, including any zeros.
Error this addresses: “four thousand and seven” written as 47, 407 or 4700 instead of 4007.
3426 · Every place has a part
Three thousand, four hundred and twenty-six
3000 + 400 + 20 + 6 = 3426
Detail from 3400 to 3440 · each small space is 1
3406 · No tens in this place
Three thousand, four hundred and six
3000 + 400 + 0 + 6 = 3406
The same detail: 3400 to 3440 · each small space is 1
WORKED EXAMPLES · 2
Zero keeps the place
3006 · Two zeros
Three thousand and six
3000 + 0 + 0 + 6 = 3006
306 = 300 + 6. Its 3 means hundreds, not thousands.
The six ones are too small to count on the overview above.
6040 · Zero ones
Six thousand and forty
6000 + 0 + 40 + 0 = 6040
Detail from 6000 to 6100 · each space is 10
Four tens, zero ones: 6040.
ANOTHER MODEL · THE SAME 3006
Build it from grouped units
Every little square is 1. Ten of one unit make the next unit.
3006 · Three thousand and six
3006 = 3000 + 0 + 0 + 6
= means the same amount.
Write 0 in the hundreds and tens places. The 3 still means 3000.
The same number on the line: 3000, then 6 more.
VISUAL PRACTICE · Name: ____________________
Complete the pictures
Fill the gaps. Draw the missing jump.
A · Make 3024
3000 to 3040 · each small space is 1
3000 + + = 3024
B · Draw the jump to 3004
The same scale · each small space is 1
3000 + =
C · Four thousand and eight
Number:
D · Six thousand and thirty
6000 + =