Worksheets › Grade 1 › More from state standards › Building numbers to 120 Grade 1 TX 1.2B
Building numbers to 120
Building numbers up to 120 from hundreds, tens and ones: in blocks, in expanded form (47 = 40 + 7), and in more than one way (34 is 3 tens 4 ones, or 2 tens 14 ones).
The PDF has this sheet, its answer key and a guide for grown-ups.
How to help
Break the number into tens and ones. To write it another way, trade one ten for ten ones: the tens go down by one and the ones go up by ten.
tens groups of ten ones single units expanded form a number as a sum of its places: 40 + 7 hundred ten tens Watch for: Writing 47 = 4 + 7 instead of 40 + 7. Forgetting to add ten ones after trading a ten. Reading one hundred twelve as 10012.
At home: Build a number with coins: dimes for tens and pennies for ones. Then trade a dime for ten pennies and ask what the number is now.
Sample sheet and answer key
Freddie's Frog Pond
Grade 1 · Building numbers to 120 · 1.2B
Name Date
Freddie the frog lives in a busy pond full of bugs, lily pads and friends. Solve each problem to help Freddie out!
77 = + 119 = 100 + + 71 = + 113 = 100 + + 89 = + 118 = 100 + +
60 = 5 tens + ones 54 = 4 tens + ones 41 = 2 tens + ones 95 = 8 tens + ones
Grade 1 · Sheet Freddie's Frog Pond
Grade 1 · Building numbers to 120 · 1.2B
Answer key Freddie the frog lives in a busy pond full of bugs, lily pads and friends. Solve each problem to help Freddie out!
1 1 0 5 is 105 2 0 5 8 is 58
77 = 70 + 7 119 = 100 + 10 + 9 71 = 70 + 1 113 = 100 + 10 + 3 89 = 80 + 9 118 = 100 + 10 + 8
60 = 5 tens + 10 ones 54 = 4 tens + 14 ones 41 = 2 tens + 21 ones 95 = 8 tens + 15 ones
Answer key Something wrong with this sheet? A wrong answer, a hard-to-read picture? Report it
New problems every time, three levels (gentle, core and stretch), themes to pick from, a second page if you want one. Each sheet comes with an answer key and a one-page guide for grown-ups.
Standard
Texas TEKS 1.2B · Build and break apart numbers up to 120 as hundreds, tens and ones in more than one way.
Also: Florida B.E.S.T. MA.1.NSO.1.2
More grade 1 sheets: more from state standards
