SME
Grade 2 Math · Number & Base Ten
Count by 5s, 10s and 100s
Use this for “Count by 10s from 230. What number do you reach after 4 jumps?”
Picture
230, 240, 250, 260, 270
Start: 230
Count by: 10
Number of jumps: 4
Number reached: 270
This is an example. Type the numbers from your problem to start.
Start
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Count by
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Number of jumps
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Number reached
answer
Number sentences
Start at 230. After 4 jumps of 10, you land on 270.
Good to know
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Skip counting adds the same number each time: by 5s, 10s or 100s.
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You can start at any number: by 10s from 230 is 230, 240, 250 and so on.
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By 10s, the ones digit stays the same. By 100s, the last two digits stay the same.
Step-by-step
WE KNOW
Start: 230
Number of jumps: 4
Count by: 10
FIND
number reached
Step 1 · Find number reached
Start at 230. After 4 jumps of 10, you land on ?.
Start at the start number. Add the count-by number for each jump.
Count on by 10s from 230: 240, 250, 260, 270 → 270
Number reached: 270
Check
Put the numbers back in. Both sides should match.
230 + 4 jumps of 10 = 270 ✓
Topic check
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