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047_G3U04_WB_CA_˙—» ¿º 2011.4.5 3:23 PM ˘ ` 15 PDF_In 2540DPI 150LPI T
047-P1-1
Finding the Unknown Digit
Circle all the digits that can go in the blank.
437+632<1,0 3 0, 1, 2, 3, 4,
5, 6, 7, 8, 9
Step 1. Find 437+632. What is the answer?
Step 2. In 437+632<1,0 3, insert 0 in the blank. Is 1,0 3 greater
than the sum found in Step 1?
Step 3. Try inserting digits 1, 2, one by one. Compare the numbers
with the sum from Step 1, and write down all the digits that can go
in the blank.
Step 4. Circle all the digits that can go in the blank.
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
047-P1-1
Finding the Unknown Digit
Circle all the digits that can go in the blank.
437+632<1,0 3 0, 1, 2, 3, 4,
5, 6, 7, 8, 9
Step 1. Find 437+632. What is the answer?
Step 2. In 437+632<1,0 3, insert 0 in the blank. Is 1,0 3 greater
than the sum found in Step 1?
Step 3. Try inserting digits 1, 2, one by one. Compare the numbers
with the sum from Step 1, and write down all the digits that can go
in the blank.
Step 4. Circle all the digits that can go in the blank.
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
